TQ2078 : Piccadilly Line Bridge over The North London Line
taken 5 years ago, near to Chiswick, Hounslow, England
The North London line (NLL) is a railway line which passes through the inner suburbs of west, north-west and north London, between Richmond in the south-west and Stratford in the east, avoiding central London. Its route is a rough semicircle. The line fully opened in 1869.
Wikipedia. Link
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