Geograph - photograph every grid square

Holborn is a station of the London Underground, located at the junction of High Holborn and Kingsway. Situated on the Piccadilly Line (between Covent Garden and Russell Square) and on the Central Line (between Tottenham Court Road and Chancery Lane), it is the only station common to the two lines, although the two lines also cross each other three times in West London. It is in Travelcard Zone 1. It was opened in 1906.

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.
Wikipedia: Link
Transport for London: Link