See the Arnos Park viaduct

A large brick viaduct skirts the western reaches of Arnos Park in the London Borough of Enfield, north London, carrying the Piccadilly line over 34 arches between Arnos Grove and Southgate stations.

The viaduct opened in 1933, as part of the Piccadilly line extension from Finsbury Park to Cockfosters, built in 44 acre Arnos Park, then a very new public space, having been opened in 1928 in what was once the Arnos Grove Estate.

For more, see http://150greatthingsabouttheunderground.com/2012/07/06/33-the-viaduct-at-arnos-grove/

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