7 World's Largest Metro Networks

Saurav Gupta

Shanghai Metro

831 km, 508 stations, 20 lines.

Beijing Subway

490 stations, 27 lines; mainland China's oldest metro system.

London Underground

402 km, 272 stations; one of the world's oldest metro systems.

Guangzhou Metro, China

Third busiest globally, with 16 operational lines.

New York City Subway

399 km; operates 24/7, 365 days a year.

Delhi Metro

350.42 km, 256 stations, 10 colour-coded lines; ranks sixth globally.

Moscow Metro

449 km, 263 stations.