Delaware Aqueduct 1 Delaware Aqueduct Q2859238 Water supply 137000 New York State, United States USA United States 1945 1945 Päijänne Water Tunnel 2 Päijänne Water Tunnel Q2120346 Water supply 120000 Southern Finland, Finland FIN Finland 1982 1982 Suzhou Metro Line 3-11 3 Suzhou Metro Line 3-11 Q6112757 Metro 86542 Suzhou, China CHN China 2023 2019–2023 Dahuofang Water Tunnel 4 Dahuofang Water Tunnel Q18111509 Water supply 85320 Liaoning, China CHN China 2009 2009 Orange–Fish River Tunnel 5 Orange–Fish River Tunnel Q1777148 Water supply 82800 South Africa ZAF South Africa 1972 1972 Bolmen Water Tunnel 6 Bolmen Water Tunnel Q453769 Water supply 82000 Kronoberg/Scania, Sweden SWE Sweden 1987 1987 Istanbul Metro (Line M11) 7 Istanbul Metro (Line M11) Q498172 Metro 69110 Istanbul, Turkey TUR Turkey 2025 2023–2025 Chengdu Metro Line 6 8 Chengdu Metro Line 6 Q22100481 Metro 68223 Chengdu, China CHN China 2020 2020 Neelum–Jhelum Hydropower Tunnel 9 Neelum–Jhelum Hydropower Tunnel Q14326986 Hydroelectric 68000 Muzaffarabad, Azad Kashmir, Pakistan PAK Pakistan 2017 2017 Tunel Emisor Oriente 10 Tunel Emisor Oriente Q16643471 Wastewater 62500 Mexico City, Mexico MEX Mexico 2019 2019 Qingdao Metro Line 1 11 Qingdao Metro Line 1 Q15935678 Metro 59818 Qingdao, China CHN China 2021 2020–2021 Guangzhou Metro Line 18 12 Guangzhou Metro Line 18 Q11062044 Metro 58300 Guangzhou, China CHN China 2021 2021 Guangzhou Metro Line 3 13 Guangzhou Metro Line 3 Q862941 Metro 57930 Guangzhou, China CHN China 2018 2005–2018 Moscow Metro Bolshaya Koltsevaya line 14 Moscow Metro Bolshaya Koltsevaya line Q617574 Metro 57538 Moscow, Russia RUS Russia 2023 2018–2023 Gotthard Base Tunnel 15 Gotthard Base Tunnel Q193002 Railway twin tube 57104 Central Swiss Alps, Switzerland CHE Switzerland 2016 2016 Beijing Subway Line 10 16 Beijing Subway Line 10 Q847886 Metro 57100 Beijing, China CHN China 2013 2008–2013 Seikan Tunnel 17 Seikan Tunnel Q99250 Railway single tube 53850 Tsugaru Strait, Japan JPN Japan 1988 1988 Beijing Subway Line 6 18 Beijing Subway Line 6 Q6553138 Metro 53400 Beijing, China CHN China 2018 2012–2018 Želivka Water Tunnel 19 Želivka Water Tunnel Q8083633 Water supply 51970 Central Bohemian Region, Czech Republic CZE Czech Republic 1972 1972 Seoul Subway: Line 5 20 Seoul Subway: Line 5 Q16950 Metro 51700 Seoul, South Korea KOR South Korea 2021 1995–2021 Rothschönberger Stolln 21 Rothschönberger Stolln Wastewater 50900 Freiberg Mining Field, Germany DEU Germany 1882 1844–1882 Channel Tunnel 22 Channel Tunnel Q10257 Railway twin tube 50450 English Channel, United Kingdom/France GBR United Kingdom 1994 1994 Yulhyeon Tunnel 23 Yulhyeon Tunnel Q20445483 Railway single tube 50300 Seoul Capital Area, South Korea KOR South Korea 2016 2016 Tunel Emisor Central 24 Tunel Emisor Central Wastewater 49742 Mexico City, Mexico MEX Mexico 1975 1975 River Arpa – Lake Sevan tunnel 25 River Arpa – Lake Sevan tunnel Q181932 Water supply 48358 Armenia (at the time of construction Soviet Union) ARM Armenia 1981 1981 Pahang – Selangor Raw Water Transfer Project 26 Pahang – Selangor Raw Water Transfer Project Water supply 44600 Pahang & Selangor, Malaysia MYS Malaysia 2014 2014 Wuhan Metro Line 2 27 Wuhan Metro Line 2 Q5952205 Metro 44347 Wuhan, China CHN China 2019 2012–2019 Lyublinsko-Dmitrovskaya Line (Zyablikovo – Fiztekh) 28 Lyublinsko-Dmitrovskaya Line (Zyablikovo – Fiztekh) Q582194 Metro 44300 Moscow Metro, Russia (construction started at the time of Soviet Union) RUS Russia 2023 1995–2023 Shanghai Subway: Line 7 29 Shanghai Subway: Line 7 Q462201 Metro 44200 Shanghai, China CHN China 2010 2009–2010 #1 Tunnel, Yellow River Diversion to Shanxi North Line 30 #1 Tunnel, Yellow River Diversion to Shanxi North Line Water supply 43670 Shanxi, China CHN China 2011 2011 #7 Tunnel, Yellow River Diversion to Shanxi South Line 31 #7 Tunnel, Yellow River Diversion to Shanxi South Line Water supply 43500 Shanxi, China CHN China 2002 2002 Beijing Subway Line 8 32 Beijing Subway Line 8 Q847771 Metro 42600 Beijing, China CHN China 2021 2012–2021 Shanghai Metro Line 15 33 Shanghai Metro Line 15 Q6553078 Metro 42300 Shanghai, China CHN China 2021 2021 Chengdu Metro Line 5 34 Chengdu Metro Line 5 Q22100474 Metro 42300 Chengdu, China CHN China 2019 2019 Beijing Subway Line 14 35 Beijing Subway Line 14 Q6553070 Metro 42000 Beijing, China CHN China 2021 2015–2021 Tianjin Metro Line 6 36 Tianjin Metro Line 6 Q10940001 Metro 42000 Tianjin, China CHN China 2021 2016–2021 Downtown line 37 Downtown line Q1663943 Metro 41900 MRT, Singapore SGP Singapore 2017 2013–2017 Nanjing Metro Line 3 38 Nanjing Metro Line 3 Q10906683 Metro 41567 Nanjing, China CHN China 2015 2011–2015 Suzhou Metro: Line 4 39 Suzhou Metro: Line 4 Q914748 Metro 41500 Suzhou, China CHN China 2017 2017 Serpukhovsko-Timiryazevskaya Line (Altufyevo – Bulvar Dmitriya Donskogo) 40 Serpukhovsko-Timiryazevskaya Line (Altufyevo – Bulvar Dmitriya Donskogo) Q739170 Metro 41470 Moscow Metro, Russia (construction started at the time of Soviet Union) RUS Russia 2002 1983–2002 Madrid Metro: Line 12 (MetroSur) 41 Madrid Metro: Line 12 (MetroSur) Q191987 Metro 40900 Madrid, Spain ESP Spain 2003 1999–2003 Tocho-mae – Shiodome – Hikarigaoka (Toei Oedo Line) 42 Tocho-mae – Shiodome – Hikarigaoka (Toei Oedo Line) Q246186 Metro 40700 Tokyo, Japan JPN Japan 2000 1991–2000 Kárahnjúkar Hydropower Plant 43 Kárahnjúkar Hydropower Plant Q692897 Hydroelectric 39700 Fljótsdalshreppur, Iceland ISL Iceland 2007 2003–2007 Quabbin Aqueduct 44 Quabbin Aqueduct Q7268223 Water supply 39600 Massachusetts, United States USA United States 1933 1933 Chengdu Metro Line 4 45 Chengdu Metro Line 4 Q11074645 Metro 39300 Chengdu, China CHN China 2017 2015–2017 Chengdu Metro Line 7 46 Chengdu Metro Line 7 Q11074646 Metro 38600 Chengdu, China CHN China 2017 2017 Seoul Subway: Line 3 (Apgujeong–Ogeum) 47 Seoul Subway: Line 3 (Apgujeong–Ogeum) Q16950 Metro 38200 Seoul, South Korea KOR South Korea 2010 1985–2010 Kaluzhsko-Rizhskaya Line (Novoyasenevskaya – Medvedkovo) 48 Kaluzhsko-Rizhskaya Line (Novoyasenevskaya – Medvedkovo) Q175271 Metro 37800 Moscow Metro, Russia (at the time of construction Soviet Union) RUS Russia 1990 1958–1990 Shenzhen Subway: Luobao Line 49 Shenzhen Subway: Luobao Line Q867680 Metro 37497 Shenzhen, China CHN China 2011 2009–2011 Chengdu Metro Line 1 50 Chengdu Metro Line 1 Q6118988 Metro 37470 Chengdu, China CHN China 2018 2010–2018 Harold D. Roberts Tunnel 51 Harold D. Roberts Tunnel Q5276944 Water supply 37464 Colorado, United States USA United States 1962 1962 Shenzhen Subway: Shekou Line 52 Shenzhen Subway: Shekou Line Q867680 Metro 36146 Shenzhen, China CHN China 2011 2010–2011 Dawushan Tunnel, Niulan River Diversion to Dianchi 53 Dawushan Tunnel, Niulan River Diversion to Dianchi Water supply 36137 Yunnan, China CHN China 2013 2013 Circle line 54 Circle line Q2154003 Metro 35700 MRT, Singapore SGP Singapore 2012 2009–2012 Busan Metro: Line 2 (Dongwon–Jangsan) 55 Busan Metro: Line 2 (Dongwon–Jangsan) Q51972 Metro 35500 Busan, South Korea KOR South Korea 2009 1999–2009 Songshan Lake Tunnel 56 Songshan Lake Tunnel Railway 35391 Dongguan, China CHN China 2016 2016 Seoul Subway: Line 6 57 Seoul Subway: Line 6 Q16950 Metro 35100 Seoul, South Korea KOR South Korea 2001 2001 Seoul Subway: Line 7 (Cheongdam–Bupyeong-gu Office) 58 Seoul Subway: Line 7 (Cheongdam–Bupyeong-gu Office) Q16950 Metro 35100 Seoul, Incheon, Bucheon and Gwangmyeong in South Korea KOR South Korea 2012 2000–2012 Tianjin Metro: Line 5 59 Tianjin Metro: Line 5 Q515817 Metro 34800 Tianjin, China CHN China 2021 2018–2021 Lötschberg Base Tunnel 60 Lötschberg Base Tunnel Q660310 Railway single track 34577 Bernese Alps, Switzerland CHE Switzerland 2007 2007 Istanbul Metro (Line M4) 61 Istanbul Metro (Line M4) Q498172 Metro 34050 Istanbul, Turkey TUR Turkey 2012 2012 Tyne-Tees Tunnel 62 Tyne-Tees Tunnel Q7059853 Water supply 34000 England, United Kingdom GBR United Kingdom 1983 1983 (and earlier) Guangzhou Metro: Line 8 63 Guangzhou Metro: Line 8 Q660751 Metro 33900 Guangzhou, China CHN China 2020 2010–2020 Mumbai Metro: Line 3 (Aqua Line) 64 Mumbai Metro: Line 3 (Aqua Line) Q646414 Metro 33500 Mumbai, India IND India 2021 2021 Madrid Metro: Line 7 65 Madrid Metro: Line 7 Q191987 Metro 32919 Madrid, Spain ESP Spain 2007 1974–2007 Koralm Tunnel 66 Koralm Tunnel Q444771 Railway twin tube 32900 Koralpe, Austria AUT Austria 2025 2025 New Guanjiao Tunnel 67 New Guanjiao Tunnel Q15853219 Railway twin tube 32645 Qinghai, China CHN China 2014 2014 Meijo Line – Meikō Line 68 Meijo Line – Meikō Line Q906775 Metro 32400 Nagoya Municipal Subway, Japan JPN Japan 2004 1965–2004 Guangzhou Metro: Line 2 69 Guangzhou Metro: Line 2 Q660751 Metro 32000 Guangzhou, China CHN China 2010 2010 Rathaus Spandau–Rudow (U7) 70 Rathaus Spandau–Rudow (U7) Q650704 Metro 31800 Berlin U-Bahn, Germany DEU Germany 1984 1924–1984 Gerede Water Transmission Tunnel 71 Gerede Water Transmission Tunnel Water supply 31592 Ankara, Turkey TUR Turkey 2019 2019 Seoul Subway: Bundang Line (Seoul Forest–Jukjeon) 72 Seoul Subway: Bundang Line (Seoul Forest–Jukjeon) Q16950 Metro 31400 Seoul, Seongnam and Yongin in South Korea KOR South Korea 2012 1994–2012 Daegu Metro: Line 2 73 Daegu Metro: Line 2 Q49458 Metro 31400 Daegu and Gyeongsan in South Korea KOR South Korea 2012 2005–2012 Milwaukee Metropolitan Sewerage District Deep Tunnel Phase 1 74 Milwaukee Metropolitan Sewerage District Deep Tunnel Phase 1 Q14714547 Wastewater 31221 Milwaukee County, Wisconsin, United States USA United States 1993 1993 Beijing Subway: Line 1 75 Beijing Subway: Line 1 Q235319 Metro 31040 Beijing, China CHN China 2000 1971–2000 Bucharest Metro: Line M1 76 Bucharest Metro: Line M1 Q622884 Metro 31010 Bucharest, Romania ROU Romania 1992 1979–1992 Istanbul Metro (Line M5) 77 Istanbul Metro (Line M5) Q498172 Metro 30900 Istanbul, Turkey TUR Turkey 2018 2017–2018 Côte-Vertu – Montmorency (Line 2 Orange) 78 Côte-Vertu – Montmorency (Line 2 Orange) Q543270 Metro 30798 Montreal Metro, Canada CAN Canada 2007 1966–2007 Shanghai Subway: Line 2 (Shanghai, China) 79 Shanghai Subway: Line 2 Q462201 Metro 30187 Shanghai, China CHN China 2000 2000 Parnas – Kupchino (line 2) 80 Parnas – Kupchino (line 2) Q2454808 Metro 30100 Saint Petersburg Metro, Russia (construction started at the time of Soviet Union) RUS Russia 2006 1961–2006 Guangzhou Metro: Line 5 81 Guangzhou Metro: Line 5 Q660751 Metro 29900 Guangzhou, China CHN China 2009 2009 Shandaken Tunnel 82 Shandaken Tunnel Q7487898 Water supply 29780 Catskill Mountains, New York, United States USA United States 1924 1924 Shanghai Subway: Line 8 83 Shanghai Subway: Line 8 Q462201 Metro 29650 Shanghai, China CHN China 2009 2007–2009 Prospekt Veteranov – Devyatkino (line 1) 84 Prospekt Veteranov – Devyatkino (line 1) Q1967220 Metro 29600 Saint Petersburg Metro, Russia (at the time of construction Soviet Union) RUS Russia 1978 1955–1978 Shanghai Subway: Line 10 85 Shanghai Subway: Line 10 Q462201 Metro 29600 Shanghai, China CHN China 2010 2010 Evinos – Mornos Tunnel 86 Evinos – Mornos Tunnel Water supply 29400 Aetolia-Acarnania, Greece GRC Greece 1995 1995 Chengdu Metro Line 2 87 Chengdu Metro Line 2 Q4391357 Metro 29000 Chengdu, China CHN China 2013 2012–2013 Hultman Aqueduct 88 Hultman Aqueduct Q19876396 Water supply 28640 Eastern Massachusetts, United States USA United States 1939 1939 Sydney Metro City 89 Sydney Metro City Q7305836 Metro 28500 Sydney, New South Wales, Australia AUS Australia 2024 2019-2024 Guadarrama Tunnel 90 Guadarrama Tunnel Q681016 Railway twin tube 28377 Sierra de Guadarrama, Spain ESP Spain 2007 2007 MetroWest Water Supply Tunnel 91 MetroWest Water Supply Tunnel Q6824448 Water supply 28300 Eastern Massachusetts, United States USA United States 2003 2003 West Qinling Tunnel 92 West Qinling Tunnel Q7986307 Railway twin tube 28236 Gansu, China CHN China 2016 2016 Taipei Metro: Blue Line 93 Taipei Metro: Blue Line Q714810 Metro 28200 Taipei, Taiwan TWN Taiwan 2015 1999–2015 Beijing Subway: Line 4 94 Beijing Subway: Line 4 Q235319 Metro 28165 Beijing, China CHN China 2010 2009–2010 Seoul Subway: Line 9 (Gimpo Airport–Sports Complex) 95 Seoul Subway: Line 9 (Gimpo Airport–Sports Complex) Q16950 Metro 28100 Seoul, South Korea KOR South Korea 2015 2009–2015 Taihang Tunnel 96 Taihang Tunnel Q7675971 Railway single tube 27848 Taihang Mountains, China CHN China 2007 2007 Morden–East Finchley (Northern line) 97 Morden–East Finchley (Northern line) Q1947443 Metro 27800 London Underground, England, United Kingdom GBR United Kingdom 1940 1890–1940 Shenyang Subway: Line 1 98 Shenyang Subway: Line 1 Q646466 Metro 27800 Shenyang, China CHN China 2010 2010 Melamchi Water Tunnel 99 Melamchi Water Tunnel Q3415895 Water supply 27000 Melamchi to Kathmandu, Nepal NPL Nepal 2021 2021 Seoul Subway: Incheon Line 1 (Bakchon–International Business District) 100 Seoul Subway: Incheon Line 1 (Bakchon–International Business District) Q16950 Metro 27000 Incheon, South Korea KOR South Korea 2009 1999–2009 Dainichi–Nagahara (Tanimachi Line) 101 Dainichi–Nagahara (Tanimachi Line) Q681742 Metro 26900 Osaka Metro, Japan JPN Japan 1983 1967–1983 LEP Tunnel 102 LEP Tunnel Q659029 Particle accelerator 26659 CERN, Switzerland/France CHE Switzerland 1988 1988 (breakthrough) Hakkōda Tunnel (Tōhoku Shinkansen) 103 Hakkōda Tunnel (Tōhoku Shinkansen) Q284705 Railway single tube 26455 Hakkōda Mountains, Japan JPN Japan 2010 2010 Şanlıurfa Irrigation Tunnels 104 Şanlıurfa Irrigation Tunnels Q8082421 Water supply 26400 Turkey TUR Turkey 2005 2005 Shanghai Subway: Line 9 105 Shanghai Subway: Line 9 Q462201 Metro 26263 Shanghai, China CHN China 2010 2007–2010 Gilgel Gibe II Power Station headrace tunnel 106 Gilgel Gibe II Power Station headrace tunnel Q2884950 Hydroelectric 26000 Ethiopia ETH Ethiopia 2009 2005–2009 #5 Tunnel, Yellow River Diversion to Shanxi South Line 107 #5 Tunnel, Yellow River Diversion to Shanxi South Line Water supply 26000 Shanxi, China CHN China 2002 2002 Daegu Metro: Line 1 108 Daegu Metro: Line 1 Q49458 Metro 25900 Daegu, South Korea KOR South Korea 2002 1997–2002 Iwate-Ichinohe Tunnel 109 Iwate-Ichinohe Tunnel Q383972 Railway single tube 25810 Ōu Mountains, Japan JPN Japan 2002 2002 MRT Blue Line 110 MRT Blue Line Q2486364 Metro 25800 Bangkok, Thailand THA Thailand 2004 2004 Sudbury Aqueduct 111 Sudbury Aqueduct Q7633494 Water supply 25750 Eastern Massachusetts, United States USA United States 1878 1878 Suzhou Metro: Line 1 112 Suzhou Metro: Line 1 Q914748 Metro 25739 Suzhou, China CHN China 2011 2007–2011 Line 3 (Athens Metro) 113 Line 3 (Athens Metro) Q6553119 Metro 25200 Athens, Greece GRC Greece 2022 1992–2022 Helsinki metro (Kivenlahti–Sörnäinen) 114 Helsinki metro (Kivenlahti–Sörnäinen) Q207287 Metro 25200 Espoo and Helsinki, Finland FIN Finland 2022 1982–2022 Taipei Metro: Orange Line (Huilong – Nanshijiao) 115 Taipei Metro: Orange Line (Huilong – Nanshijiao) Q714810 Metro 25100 Taipei, Taiwan TWN Taiwan 2013 1998–2013 Musil Tunnel 116 Musil Tunnel Railway twin tube 25080 Wonju–Jecheon (Jungang Line), South Korea KOR South Korea 2021 2021 Thames Tideway Tunnel 117 Thames Tideway Tunnel Q17018923 Wastewater 25000 London, England, United Kingdom GBR United Kingdom 2025 2025 Pajares Base Tunnel 118 Pajares Base Tunnel Q954467 Railway twin tube 24667 Asturias/León, Spain ESP Spain 2023 2023 Lærdal Tunnel 119 Lærdal Tunnel Q303563 Road 24510 Lærdal–Aurland, Norway NOR Norway 2000 2000 Yellow Line (Delhi Metro): Guru Tegh Bahadur Nagar – Saket 120 Yellow Line (Delhi Metro): Guru Tegh Bahadur Nagar – Saket Q795156 Metro 24000 Delhi, India IND India 2010 2004–2010 Madrid Metro: Line 1 121 Madrid Metro: Line 1 Q191987 Metro 23876 Madrid, Spain ESP Spain 2007 1919–2007 Lainzer/Wienerwaldtunnel 122 Lainzer/Wienerwaldtunnel Q873414 Railway 23844 west of Vienna, Austria AUT Austria 2012 2012 Harbour Area Treatment Scheme (HATS) Stage 1 123 Harbour Area Treatment Scheme (HATS) Stage 1 Q11703256 Wastewater 23600 Hong Kong, China (construction started in British Hong Kong) HKG Hong Kong 2001 2001 Eucumbene-Snowy Tunnel 124 Eucumbene-Snowy Tunnel Water supply 23500 New South Wales, Australia AUS Australia 1965 1965 South Lüliangshan Tunnel 125 South Lüliangshan Tunnel Railway 23473 Shanxi, China CHN China 2014 2014 Madrid Metro: Line 6 126 Madrid Metro: Line 6 Q191987 Metro 23472 Madrid, Spain ESP Spain 2007 1979–2007 Angrignon – Honoré-Beaugrand (Line 1 Green) 127 Angrignon – Honoré-Beaugrand (Line 1 Green) Q543509 Metro 23262 Montreal Metro, Canada CAN Canada 2007 1966–2007 Warsaw Metro Line 1: Kabaty – Młociny 128 Warsaw Metro Line 1: Kabaty – Młociny Q320028 Metro 23100 Warsaw, Poland POL Poland 2008 1983–2008 Beijing Subway: Line 2 129 Beijing Subway: Line 2 Q235319 Metro 23100 Beijing, China CHN China 1987 1969–1987 Xinma Hydroelectric Power Station Water Tunnel 130 Xinma Hydroelectric Power Station Water Tunnel Hydroelectric 22975 Sichuan, China CHN China 2009 2009 Iiyama Tunnel 131 Iiyama Tunnel Railway 22225 Iiyama, Japan JPN Japan 2015 2015 Daishimizu Tunnel 132 Daishimizu Tunnel Q2623189 Railway 22221 Mount Tanigawa, Japan JPN Japan 1982 1982 Eucumbene-Tumut Tunnel 133 Eucumbene-Tumut Tunnel Water supply 22200 New South Wales, Australia AUS Australia 1959 1959 Tianshan Shengli Tunnel 134 Tianshan Shengli Tunnel Road twin tube 22130 Xinjiang, China CHN China 2025 2025 WestConnex 135 WestConnex Q7984181 Road 22000 Sydney, New South Wales, Australia AUS Australia 2023 2023 (2019–2020 partial completion) Daegwallyeong Tunnel 136 Daegwallyeong Tunnel Railway 21755 Pyeongchang–Gangneung (Gyeonggang Line), South Korea KOR South Korea 2017 2017 Vorotan–Arpa Tunnel 137 Vorotan–Arpa Tunnel Q737363 Water supply 21652 Armenia (construction started at the time of Soviet Union) ARM Armenia 2004 2004 Alva B. Adams Tunnel 138 Alva B. Adams Tunnel Q4737615 Water supply & hydroelectric 21100 Colorado, United States USA United States 1947 1947 (opened) UNK proton accelerator 139 UNK proton accelerator Q7865346 Particle accelerator (incomplete) 21000 Protvino, Russia (construction started at the time of Soviet Union) RUS Russia 1994 1994 (breakthrough) Guangfo Metro 140 Guangfo Metro Q3272527 Metro 20900 Foshan, China CHN China 2010 2010 Luliangshan Tunnel 141 Luliangshan Tunnel Q6711555 Railway twin tube 20785 Shanxi, China CHN China 2011 2011 Shanghai Subway: Line 4 142 Shanghai Subway: Line 4 Q462201 Metro 20740 Shanghai, China CHN China 2007 2005–2007 Barcelona Metro: Line 1 143 Barcelona Metro: Line 1 Q237189 Metro 20700 Barcelona, Spain ESP Spain 1992 1926–1992 Ward Tunnel 144 Ward Tunnel Q7106262 Hydroelectric 20610 California, United States USA United States 1925 1920–1925 Busan Metro: Line 1 (Hadan-Busan Nat'l Univ. of Education) 145 Busan Metro: Line 1 (Hadan-Busan Nat'l Univ. of Education) Q51972 Metro 20600 Busan, South Korea KOR South Korea 1994 1985–1994 Xian Subway: Line 2 146 Xian Subway: Line 2 Q555733 Metro 20500 Xi'an, China CHN China 2011 2011 Daejeon Metro: Line 1 147 Daejeon Metro: Line 1 Q624200 Metro 20470 Daejeon, South Korea KOR South Korea 2007 2006–2007 Nanjing Metro Line 2 148 Nanjing Metro Line 2 Q5960302 Metro 20380 Nanjing, China CHN China 2010 2010 Shanghai Subway: Line 6 149 Shanghai Subway: Line 6 Q462201 Metro 20336 Shanghai, China CHN China 2007 2007 Geumjeong Tunnel 150 Geumjeong Tunnel Railway 20323 Busan, South Korea KOR South Korea 2010 2010 Baku Metro (Red Line) 151 Baku Metro (Red Line) Q213271 Metro 20100 Baku, Azerbaijan AZE Azerbaijan 2002 1967–2002 Wushaoling Tunnel 152 Wushaoling Tunnel Q572012 Railway twin tube 20060 Wuwei, China CHN China 2007 2006–2007 Olmos Transandino Project 153 Olmos Transandino Project Q5644717 Water supply 20000 Guabal, Peru PER Peru 2011 2011 The London Connection 154 The London Connection Electric power transmission tunnel 20000 London, England, United Kingdom GBR United Kingdom 2005 2005 Simplon Tunnel 155 Simplon Tunnel Q599515 Railway twin tube 19803 Lepontine Alps, Switzerland/Italy CHE Switzerland 1906 1906 Mantaro Hydroelectricity Project Tunnel 156 Mantaro Hydroelectricity Project Tunnel Hydroelectric 19800 Colcabamba, Peru PER Peru 1973 1973 Shin Hokuriku Tunnel 157 Shin Hokuriku Tunnel Railway 19760 Fukui Prefecture, Japan JPN Japan 2024 2024 Ankara Metro (AKM-Koru) 158 Ankara Metro (AKM-Koru) Q748402 Metro 19660 Ankara, Turkey TUR Turkey 2014 1997–2014 Follo Line 159 Follo Line Q3353565 Railway 19500 Oslo, Norway NOR Norway 2022 2022 Koltsevaya Line (Circle Line) 160 Koltsevaya Line (Circle Line) Q831673 Metro 19400 Moscow Metro, Russia (at the time of construction Soviet Union) RUS Russia 1954 1950–1954 Futang Hydroelectric Power Station Water Tunnel 161 Futang Hydroelectric Power Station Water Tunnel Hydroelectric 19319 Sichuan, China CHN China 2004 2004 Seoul Subway: Bundang Line (Suwon station–Jukjeon station) 162 Seoul Subway: Bundang Line (Suwon station–Jukjeon station) Q16950 Metro 19300 Yongin and Suwon in South Korea KOR South Korea 2013 2007–2013 Qamchiq Tunnel 163 Qamchiq Tunnel Q22996928 Railway single tube 19200 Angren–Pap railway, Uzbekistan UZB Uzbekistan 2016 2016 North East line 164 North East line Q1725116 Metro 19200 MRT, Singapore SGP Singapore 2011 2003–2011 Suzhou Metro: Line 2 165 Suzhou Metro: Line 2 Q914748 Metro 19146 Suzhou, China CHN China 2012 2009–2012 Maskoŭskaja Line 166 Maskoŭskaja Line Q28604 Metro 19100 Minsk Metro, Belarus (construction started at the time of Soviet Union) BLR Belarus 2014 1984–2014 Vereina 167 Vereina Q668000 Railway single track 19058 Silvretta, Switzerland CHE Switzerland 1999 1999 Seoul Subway: Line 4 (Ssangmun–Ichon) 168 Seoul Subway: Line 4 (Ssangmun–Ichon) Q16950 Metro 19000 Seoul, South Korea KOR South Korea 1980 1980 Harbour Area Treatment Scheme (HATS) Stage 2 169 Harbour Area Treatment Scheme (HATS) Stage 2 Q11703256 Wastewater 18800 Hong Kong, China HKG Hong Kong 2015 2015 Shin-Kanmon Tunnel 170 Shin-Kanmon Tunnel Q8016189 Railway 18713 Kanmon Straits, Japan JPN Japan 1975 1975 Shiziping Hydroelectric Power Station Water Tunnel 171 Shiziping Hydroelectric Power Station Water Tunnel Hydroelectric 18712 Sichuan, China CHN China 2010 2010 Vaglia 172 Vaglia Q82876 Railway single tube 18711 Bologna – Firenze, Italy ITA Italy 2009 2009 Baoxing Hydroelectric Power Station Water Tunnel 173 Baoxing Hydroelectric Power Station Water Tunnel Q11996683 Hydroelectric 18676 Sichuan, China CHN China 2007 2007 Apennine Base Tunnel 174 Apennine Base Tunnel Q618197 Railway single tube 18507 Tuscan-Emilian Apennines, Italy ITA Italy 1934 1934 Obolonsko–Teremkivska line 175 Obolonsko–Teremkivska line Q2204296 Metro 18480 Kyiv Metro, Ukraine (construction started at the time of Soviet Union) UKR Ukraine 2013 1976–2013 Istanbul Metro (Line M3) 176 Istanbul Metro (Line M3) Q498172 Metro 18460 Istanbul, Turkey TUR Turkey 2022 2013–2022 Qinling Tunnel I-II 177 Qinling Tunnel I-II Railway twin tube 18460 Qin Mountains, China CHN China 2000 2000 Tatev Hydroelectric Power Station Water Tunnel 178 Tatev Hydroelectric Power Station Water Tunnel Q23038779 Hydroelectric 18400 Armenia (at the time of construction Soviet Union) ARM Armenia 1970 1970 Yamate Tunnel 179 Yamate Tunnel Q6142370 Road twin tube 18200 Tokyo, Japan JPN Japan 2015 2015 South Taihangshan Tunnel 180 South Taihangshan Tunnel Railway 18125 Shanxi, China CHN China 2014 2014 Shanghai Subway: Line 1 181 Shanghai Subway: Line 1 Q462201 Metro 18110 Shanghai, China CHN China 1995 1995 Avtozavodskaya Line 182 Avtozavodskaya Line Q2638932 Metro 18100 Minsk Metro, Belarus (construction started at the time of Soviet Union) BLR Belarus 2005 1990–2005 Zhongnanshan Tunnel 183 Zhongnanshan Tunnel Q197883 Road twin tube 18040 Shaanxi, China CHN China 2007 2007 Line 2 (Athens Metro) 184 Line 2 (Athens Metro) Q9295813 Metro 17900 Athens, Greece GRC Greece 2013 1991–2013 Beijing Subway: Line 5 185 Beijing Subway: Line 5 Q235319 Metro 17825 Beijing, China CHN China 2007 2007 Shuakhevi headrace and pressure tunnel 186 Shuakhevi headrace and pressure tunnel Q6002123 Hydroelectric 17800 Shuakhevi, Adjara, Georgia GEO Georgia (country) 2017 2013–2017 Jingpingshan 187 Jingpingshan Road 17500 Sichuan, China CHN China 2008 2008 Shenzhen Subway: Longgang Line 188 Shenzhen Subway: Longgang Line Q867680 Metro 17333 Shenzhen, China CHN China 2011 2010–2011 Kholodnohirsko–Zavodska Line 189 Kholodnohirsko–Zavodska Line Q2710248 Metro 17300 Kharkiv Metro, Ukraine (at the time of construction Soviet Union) UKR Ukraine 1978 1975–1978 Seoul Subway: Shinbundang Line 190 Seoul Subway: Shinbundang Line Q16950 Metro 17300 Seoul and Seongnam in South Korea KOR South Korea 2011 2011 Mavi Tünel (Blue Tunnel) 191 Mavi Tünel (Blue Tunnel) Q6037835 Water supply 17034 Konya, Turkey TUR Turkey 2012 2012 Gotthard Road Tunnel 192 Gotthard Road Tunnel Q684927 Road 16918 Lepontine Alps, Switzerland CHE Switzerland 1980 1980 İzmir Metro Line M1 193 İzmir Metro Line M1 Q3238655 Metro 16900 İzmir, Turkey TUR Turkey 2023 2000–2023 Guangzhou Metro: Line 4 194 Guangzhou Metro: Line 4 Q660751 Metro 16790 Guangzhou, China CHN China 2005 2005 Barcelona Metro: Line 4 195 Barcelona Metro: Line 4 Q237189 Metro 16700 Barcelona, Spain ESP Spain 1999 1929–1999 Seoul Subway: Line 2 (Jamsil–Sillim) 196 Seoul Subway: Line 2 (Jamsil–Sillim) Q16950 Metro 16700 Seoul, South Korea KOR South Korea 1984 1980–1984 Barcelona Metro: Line 3 197 Barcelona Metro: Line 3 Q237189 Metro 16600 Barcelona, Spain ESP Spain 2001 1924–2001 Barcelona Metro: Line 5 198 Barcelona Metro: Line 5 Q237189 Metro 16600 Barcelona, Spain ESP Spain 1983 1959–1983 Murrumbidgee-Eucumbene Tunnel 199 Murrumbidgee-Eucumbene Tunnel Water supply 16600 New South Wales, Australia AUS Australia 1961 1961 Istanbul Metro (Line M2) 200 Istanbul Metro (Line M2) Q498172 Metro 16500 Istanbul, Turkey TUR Turkey 2009 2000–2009 Beijing Subway: Line 9 201 Beijing Subway: Line 9 Q235319 Metro 16500 Beijing, China CHN China 2012 2011–2012 Jinkang Hydroelectric Power Station Water Tunnel 202 Jinkang Hydroelectric Power Station Water Tunnel Hydroelectric 16490 Sichuan, China CHN China 2006 2006 Madrid Metro: Line 8 203 Madrid Metro: Line 8 Q191987 Metro 16467 Madrid, Spain ESP Spain 2007 1998–2007 Guangzhou Metro: Line 1 204 Guangzhou Metro: Line 1 Q660751 Metro 16449 Guangzhou, China CHN China 1997 1997 Madrid Metro: Line 3 205 Madrid Metro: Line 3 Q191987 Metro 16424 Madrid, Spain ESP Spain 2007 1939–2007 Rokkō Tunnel 206 Rokkō Tunnel Q11392446 Railway 16250 Mount Rokkō, Japan JPN Japan 1972 1972 Solan Tunnel 207 Solan Tunnel Q497511 Railway 16240 Taebaek, Gangwon-do, South Korea KOR South Korea 2012 2012 Kemano T1 and T2 208 Kemano T1 and T2 Q21188284 Hydroelectric twin tube 16000 Kemano, Canada CAN Canada 1954 1954; 2022 Seoul Subway: Line 7 (Suraksan–Konkuk University) 209 Seoul Subway: Line 7 (Suraksan–Konkuk University) Q16950 Metro 16000 Seoul, South Korea KOR South Korea 1996 1996 Münsterertunnel 210 Münsterertunnel Railway 15990 Tyrol, Austria AUT Austria 2012 2012 Xiangshan Tunnel 象山隧道 211 Xiangshan Tunnel 象山隧道 Railway 15917 Fujian, China CHN China 2012 2012 Terfenertunnel 212 Terfenertunnel Railway 15840 Tyrol, Austria AUT Austria 2012 2012 Henderson Tunnel 213 Henderson Tunnel Former railway 15800 Front Range, United States USA United States 1976 1976 Istanbul Metro (Line M9) 214 Istanbul Metro (Line M9) Q498172 Metro 15800 Istanbul, Turkey TUR Turkey 2024 2013–2024 Pandaoling Tunnel, Datong River Diversion to Shaanxi Project 215 Pandaoling Tunnel, Datong River Diversion to Shaanxi Project Water supply 15723 Shaanxi, China CHN China 1994 1994 Copenhagen Metro: City Circle Line 216 Copenhagen Metro: City Circle Line Q212741 Metro 15500 Denmark DNK Denmark 2019 2019 Budapest Metro: Line 3 217 Budapest Metro: Line 3 Q692916 Metro 15500 Hungary HUN Hungary 1990 1976–1990 Furka Base 218 Furka Base Q665158 Railway single track 15442 Urner Alps, Switzerland CHE Switzerland 1982 1982 Ceneri Base Tunnel 219 Ceneri Base Tunnel Q666767 Railway twin tube 15400 Lepontine Alps, Switzerland CHE Switzerland 2020 2020 Seoul Subway: Line 3 (Gupabal–Geumho) 220 Seoul Subway: Line 3 (Gupabal–Geumho) Q16950 Metro 15400 Seoul, South Korea KOR South Korea 1985 1985 Tianjin Subway: Line 1 221 Tianjin Subway: Line 1 Q515817 Metro 15378 Tianjin, China CHN China 2006 1976–2006 Haruna Tunnel 222 Haruna Tunnel Q11541885 Railway 15350 Gunma Prefecture, Japan JPN Japan 1982 1982 Severomuysky Tunnel 223 Severomuysky Tunnel Q1520900 Railway single track 15343 Severomuysky Range, Russia (construction started at the time of Soviet Union) RUS Russia 2003 2003 Deer Island Outfall Tunnel 224 Deer Island Outfall Tunnel Q5250772 Wastewater 15290 Deer Island, Boston, Massachusetts, United States USA United States 2000 2000 Firenzuola 225 Firenzuola Q82693 Railway single tube 15285 Bologna – Firenze, Italy ITA Italy 2009 2009 Inguri Hydroelectric Power Station Water Tunnel 226 Inguri Hydroelectric Power Station Water Tunnel Q162887 Hydroelectric 15279 Georgia (at the time of construction Soviet Union) GEO Georgia (country) 1978 1978 Shanghai Subway: Line 2 #2 227 Shanghai Subway: Line 2 Q462201 Metro 15274 Shanghai, China CHN China 2000 2000 Jinquidi Tunnel, Niulan River Diversion to Dianchi 228 Jinquidi Tunnel, Niulan River Diversion to Dianchi Water supply 15257 Yunnan, China CHN China 2013 2013 Baotan Hydroelectric Power Station Water Tunnel 229 Baotan Hydroelectric Power Station Water Tunnel Hydroelectric 15200 Guangxi, China CHN China 2010 2010 Gorigamine Tunnel 230 Gorigamine Tunnel Q11372710 Railway 15175 Nagano Prefecture, Japan JPN Japan 1997 1997 Xuecheng Hydroelectric Power Station Water Tunnel 231 Xuecheng Hydroelectric Power Station Water Tunnel Hydroelectric 15174 Sichuan, China CHN China 2007 2007 Monte Santomarco 232 Monte Santomarco Q3757698 Railway single track 15040 Paola – Cosenza, Italy ITA Italy 1987 1987 Gotthard Rail Tunnel 233 Gotthard Rail Tunnel Q688618 Railway single tube 15003 Lepontine Alps, Switzerland CHE Switzerland 1882 1882 Gwangju Metro: Line 1 (Sotae station–Dosan station) 234 Gwangju Metro: Line 1 (Sotae station–Dosan station) Q495335 Metro 15000 Gwangju, South Korea KOR South Korea 2004 2004 Nakayama Tunnel 235 Nakayama Tunnel Q17226481 Railway 14857 Gunma Prefecture, Japan JPN Japan 1982 1982 Dangara Irrigation Tunnel 236 Dangara Irrigation Tunnel Water supply 14800 Nurek, Tajikistan (at the time of construction Soviet Union) TJK Tajikistan 1987 1987 Cuajone-El Sargento 237 Cuajone-El Sargento Railway 14724 Ilo-Toquepala / Cuajone Industrial Railroad – Southern Peru Copper Corporation, Peru PER Peru 1975 1975 Mount Macdonald Tunnel 238 Mount Macdonald Tunnel Q1950320 Railway single tube 14723 Rogers Pass, Glacier National Park, Canada CAN Canada 1989 1989 Misaka Sasago Tunnel 239 Misaka Sasago Tunnel Railway (maglev) 14613 Yamanashi, Japan JPN Japan 1996 1996 Lötschberg Tunnel 240 Lötschberg Tunnel Q672167 Railway single tube 14612 Bernese Alps, Switzerland CHE Switzerland 1913 1913 Caoe River Diversion Project 241 Caoe River Diversion Project Water supply 14600 Zhejiang, China CHN China 2011 2011 Romerike Tunnel 242 Romerike Tunnel Q1769246 Railway single tube 14580 Oslo – Lillestrøm, Norway NOR Norway 1999 1999 Fajiushan Tunnel 243 Fajiushan Tunnel Railway 14573 Shanxi, China CHN China 2014 2014 Snowy-Geehi Tunnel 244 Snowy-Geehi Tunnel Water supply 14500 New South Wales, Australia AUS Australia 1966 1966 Baku Metro (Green Line) 245 Baku Metro (Green Line) Q213271 Metro 14500 Baku Azerbaijan AZE Azerbaijan 2011 1976–2011 Seoul Subway: Line 4 (Isu–Beomgye) 246 Seoul Subway: Line 4 (Isu–Beomgye) Q16950 Metro 14500 Seoul, Gwacheon and Anyang in South Korea KOR South Korea 1994 1980–1994 Zigana Tunnel 247 Zigana Tunnel Q28220601 Road twin tube 14481 Torul–Maçka, Turkey TUR Turkey 2023 2023 Jisha Hydroelectric Power Station Water Tunnel 248 Jisha Hydroelectric Power Station Water Tunnel Hydroelectric 14467 Yunnan, China CHN China 2007 2007 Ryfylke Tunnel 249 Ryfylke Tunnel Q20751227 Road twin tube 14400 Stavanger–Strand, Norway NOR Norway 2019 2019 #6 Tunnel, Yellow River Diversion to Shanxi South Line 250 #6 Tunnel, Yellow River Diversion to Shanxi South Line Water supply 14400 Shanxi, China CHN China 2002 2002 Ala Mountain Pass Water Supply Project 251 Ala Mountain Pass Water Supply Project Water supply 14346 Xinjiang, China CHN China 2010 2010 Ovit Tunnel 252 Ovit Tunnel Q6922627 Road twin tube 14346 Erzurum Province–Rize Province, Turkey TUR Turkey 2018 2018 Stockholm Metro: Tunnelbana 3 (Blue Line) Kungsträdgården–Hjulsta 253 Stockholm Metro: Tunnelbana 3 (Blue Line) Kungsträdgården–Hjulsta Q272926 Metro 14300 Stockholm, Sweden SWE Sweden 1977 1975–1977 Dayaoshan Tunnel 254 Dayaoshan Tunnel Railway single tube 14294 Nanling Mountains, China CHN China 1987 1987 Istanbul Metro (Line M8) 255 Istanbul Metro (Line M8) Q498172 Metro 14270 Istanbul, Turkey TUR Turkey 2023 2023 Zaramag Hydroelectric Power Station Water Tunnel 256 Zaramag Hydroelectric Power Station Water Tunnel Hydroelectric 14226 Ardon River, North Ossetia, Russia RUS Russia 2015 2015 Tooma-Tumut Tunnel 257 Tooma-Tumut Tunnel Water supply 14200 New South Wales, Australia AUS Australia 1961 1961 Metro Lisbon – Blue (Seagull) Line 258 Metro Lisbon – Blue (Seagull) Line Q746032 Metro 14000 Lisbon, Portugal PRT Portugal 2007 1959–2007 MTR – Island line (West of Heng Fa Chuen) 259 MTR – Island line (West of Heng Fa Chuen) Q989316 Metro 14000 Hong Kong, China (construction started at the time of British Hong Kong) HKG Hong Kong 2014 1985–2014 Arlberg Road Tunnel 260 Arlberg Road Tunnel Q669602 Road 13972 Arlberg, Austria AUT Austria 1978 1978 Shanggongshan Tunnel, Zhangjiuhe Water Supply Project 261 Shanggongshan Tunnel, Zhangjiuhe Water Supply Project Water supply 13941 Yunnan, China CHN China 2007 2007 Dayingshan #4 Hydroelectric Power Station Water Tunnel 262 Dayingshan #4 Hydroelectric Power Station Water Tunnel Hydroelectric 13932 Yunnan, China CHN China 2009 2009 Hokuriku Tunnel 263 Hokuriku Tunnel Q11404391 Railway 13870 Fukui Prefecture, Japan JPN Japan 1962 1962 Xiapu Tunnel 264 Xiapu Tunnel Railway single tube 13838 Fujian, China CHN China 2009 2009 Yesanguan Tunnel 265 Yesanguan Tunnel Railway twin tube 13838 Hubei, China CHN China 2010 2010 Centrala Hidroelectrică Lotru-Ciunget 266 Centrala Hidroelectrică Lotru-Ciunget Hydroelectric 13719 Ciungetu, Romania ROU Romania 1972 1972 Fréjus (Mont Cenis) 267 Fréjus (Mont Cenis) Q537800 Railway single tube 13657 Alps, France/Italy (construction started in the Kingdom of Sardinia) FRA France 1871 1871 Xishan Tunnel 268 Xishan Tunnel Road twin tube 13654 Shanxi, China CHN China 2012 2012 North Tianshan Tunnel 269 North Tianshan Tunnel Railway single tube 13610 Xinjiang, China CHN China 2009 2009 Marmaray 270 Marmaray Q497844 Railway 13600 Istanbul, Turkey TUR Turkey 2013 2013 Savio Rail Tunnel 271 Savio Rail Tunnel Q599128 Railway single track 13575 Helsinki – Kerava, Finland FIN Finland 2008 2008 Busan Metro: Line 3 (Suyeong–Deokcheon) 272 Busan Metro: Line 3 (Suyeong–Deokcheon) Q51972 Metro 13500 Busan, South Korea KOR South Korea 2005 2005 Shin Shimizu Tunnel 273 Shin Shimizu Tunnel Q22329636 Railway twin tube 13500 Mount Tanigawa, Japan JPN Japan 1967 1967 Mount Erlang Tunnel 274 Mount Erlang Tunnel Q6920669 Road 13433 Sichuan, China CHN China 2018 2018 Hex River Tunnel 275 Hex River Tunnel Q4940470 Railway single track 13400 Hex River Pass, South Africa ZAF South Africa 1989 1989 Wonhyo Tunnel 276 Wonhyo Tunnel Railway 13270 Ulsan, South Korea KOR South Korea 2010 2010 Dabieshan Tunnel 277 Dabieshan Tunnel Railway single tube 13256 Hubei, China CHN China 2008 2008 Schlern Tunnel 278 Schlern Tunnel Railway 13159 South Tyrol, Italy ITA Italy 1993 1993 Caponero-Capoverde 279 Caponero-Capoverde Q302337 Railway single tube 13135 Genova – Ventimiglia, Italy ITA Italy 2001 2001 Hongtiguan Tunnel 280 Hongtiguan Tunnel Road twin tube 13122 Shanxi, China CHN China 2013 2013 Barcelona Metro line 2 281 Barcelona Metro line 2 Q1348921 Metro 13100 Barcelona, Spain ESP Spain 1997 1985–1997 Aki Tunnel 282 Aki Tunnel Q65261035 Railway 13030 Hiroshima Prefecture, Japan JPN Japan 1975 1975