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The London Underground system is also known as the "Tube". It is the oldest underground system in the world, the first section dating from 1863. The present system has over 250 miles of track and 272 stations. There are 11 lines covering Greater London, Essex, Buckinghamshire & Hertfordshire. Nearly half the system is above ground.
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Westminster is served by the Circle, District and Jubilee lines. On the Circle and District lines, the station is between St. James's Park and Embankment and, on the Jubilee line it is between Green Park and Waterloo. It is in Travelcard Zone 1.
The station is in two parts: sub-surface platforms opened in 1868 by the Metropolitan District Railway (MDR) and deep level platforms opened in 1999 as part of the Jubilee line extension from Green Park to Stratford.