世界十一大地鐵系統 1. London, England

1. London, England
The London Underground is Europe's largest metro subway system and is the world's oldest underground system (it was inaugurated in 1863). It covers 253 miles of track and transports 976 million people yearly. The Underground is also connected to a variety of rail services to London's surrounding areas (including the Eurostar to Paris). Among these services is the Docklands Light Railway (DLR), a popular driverless light rail extension, which offers many scenic views of the Thames river and surrounding areas.

Highlights: Cushioned seats. LED time displays hanging from the ceiling in stations indicate the number of minutes you need to wait before the next train. Eclectic station artwork (such as this January 1st photograph of the Gloucester Road station). Oyster cards allow you to touch against a subway turnstile and go -- and you can pay as you ride.