Hampstead Station, on the Northern Line, is 192 feet below the street level. Note, however, that Hampstead is on a very steep hill, and so the absolute depth isn't that great. The Jubilee Line runs at the deepest absolute point, 105 feet below mean sea level.
which city has underground railway system streatching 265kmand 170 station
London Underground is a rapid transit system in London, England. Part of the system consists of underground tunnels.
The London underground system is usually referred to as 'the tube'.
It is the subway system under London.
it is neither in underground or overground. it is a separate system.
London, England
That is just a common name that stuck. It is now called London Transport Limited (since 1985) and operates under the name Transport For London. Years ago there were many names for many companies that make up the London Underground. Another common name is "The Tube"
The London Underground, commonly known as the Tube, is the oldest metro system in the world. It opened in 1863 and has since grown to become one of the most extensive systems globally.
The Tube.
London
London, England
London