Geograph - photograph every grid square

Finsbury Park Station is a busy transport interchange in North London. The interchange consists of an interconnected National Rail station, London Underground station and two bus stations. The main entrances are by the eastern bus station on Station Place. The National Rail ticket office here lies in between one entrance marked by the Underground roundel symbol, while the other is marked by the National Rail symbol, and provides direct access to the main line platforms. There is another exit by the western bus station along Wells Terrace, incorporating the Underground ticket office, plus a narrow side entrance to the south on the A503 Seven Sisters Road. The complex is located in Travelcard Zone 2.
The station is named after the nearby Finsbury Park, one of the oldest of London's Victorian parks. It is also used by many Arsenal supporters on matchdays, as the club's ground is just a short walk away.
Wikipedia: Link

Mark Wallinger, one of the UK’s leading contemporary artists, has created a major new artwork for London Underground to celebrate its 150th anniversary. The result, commissioned by Art on the Underground, is a multi-part work on a huge scale that will be installed in every one of the Tube’s 270 stations.

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

A few years ago I read a book by Mark Mason "Walking the lines" in which he walked the route of the London Underground lines, overground. I will repeat this visiting all 272 stations (some more than once). My route tries to follow the line of the railway as closely as possible, using footpaths and roads, deviations are made to make the walk more "interesting".