Geograph - photograph every grid square

Southgate is a London Underground Piccadilly line station in Southgate. It is located between Arnos Grove and Oakwood stations and is in Travelcard Zone 4. The station opened in 1933. The station is built in the Art Deco/Streamline Moderne design style using brick, reinforced concrete and glass and is one of the best known of the many stations Charles Holden designed for London Underground. The station building is circular with a flat projecting concrete roof.
Grade II* listed. Link
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".