From the longer Wikipedia page [1]

Merton Park railway station was a railway station in Merton, Surrey (now southwest London), serving both the West Croydon to Wimbledon Line and the Tooting, Merton and Wimbledon Railway. Closed in 1997, part of the site now serves as a tram stop on the New Addington to Wimbledon line of the Tramlink network.

Merton Park Green Walk is described at [2].

The Disused Stations page is [3].