London Underground
From Conservapedia
The London Underground (often referred to as "The Tube") is London's underground railway system. Many lines in the outskirts are at or above ground level.
It is comprised of the Bakerloo, Central, Circle, District, Hammersmith & City, Jubilee, Metropolitan, Northern, Piccadilly (serves Heathrow Airport), Victoria and Waterloo & City lines.
The London underground is one of the oldest subways on earth (others include: Glasgow, New York, Paris etc)
