10 biggest underground systems in the world

10. Chongqing Rail Transit

fot. Wahsaw / wikipedia.org (CC BY-SA 4.0)

• total length: 370 km
• location: Chongqing (China)
• year of discovery: 2005
• last expansion: 2021
• number of passengers in 2020: 839,750,000

9. Nanjing Metro

fot. SSYoung and other contributors / wikipedia.org (CC BY-SA 4.0)

• total length: 378 km
• location: Nanjing (China)
• year of discovery: 2005
• last expansion: 2018
• number of passengers in 2020: 801,340,000

8. New York City Subway

fot. CountZ at English Wikipedia (CC BY-SA 3.0)

• total length: 399 km
• location: New York (United States)
• year of discovery: 1904
• last expansion: 2017
• number of passengers in 2020: 639,500,000

7. London Underground

• total length: 405 km
• location: London (UK)
• year of discovery: 1863
• last expansion: 2021
• number of passengers in 2020: 296,000,000

6. Shenzhen Metro

fot. Wahsaw / wikipedia.org (CC BY-SA 4.0)

• total length: 411 km
• location: Shenzhen (China)
• year of discovery: 2004
• last expansion: 2020
• number of passengers in 2020: 1,626,730,000

5. Moscow Metro

fot. Sameboat / wikipedia.org (CC BY-SA 3.0)

• total length: 412 km
• location: Moscow (Russia)
• year of discovery: 1935
• last expansion: 2021
• number of passengers in 2020: 1,618,200,000

4. Chengdu Metro

fot. Alan Fan Pei / wikipedia.org (CC BY-SA 4.0)

• total length: 519 km
• location: Chengdu (China)
• year of discovery: 2010
• last expansion: 2020
• number of passengers in 2020: 1,219,620,000

3. Guangzhou Metro

fot. Tim Wu / wikipedia.org (CC BY-SA 4.0)

• total length: 531 km
• location: Canton (China)
• year of discovery: 1997
• last expansion: 2021
• number of passengers in 2020: 2,415,600,000

2. Beijing Subway

fot. Ran and Hat600 / wikipedia.org (CC BY-SA 3.0)

• total length: 727 km
• location: Beijing (China)
• year of discovery: 1971
• last expansion: 2020
• number of passengers in 2020: 2,292,650,000

1. Shanghai Metro

fot. Alan Fan Pei / wikipedia.org (CC BY-SA 4.0)

• total length: 743 km
• location: Shanghai (China)
• year of discovery: 1993
• last expansion: 2021
• number of passengers in 2020: 2,834,690,000