The location is in Crystal Palace, in Southeast London, in a woodland called Stambourne Woods. The entrance is off Auckland Road.
Walk up the path in Stambourne Woodland, starting from Auckland Road (the entrance to the path is at 51.412812,-0.078494).
Stambourne Woodland Walk covers an area of once neglected and overgrown land lying between developments in Stambourne Way and Fox Hill. The land originally formed the gardens of large Victorian Villas built on the hill over looking Croydon, but as the buildings fell into disrepair the gardens disappeared amongst dense, impenetrable scrub and trees.
The natural vegatation of the woodland is home to many birds, small animal and insects.
Nearby is Crystal Palace park, erstwhile home to the "Crystal Palace" that hosted the Great Exhibition in Hyde Park in 1851 and which was reassembled on top of a hill in what was then a quiet suburb in Southeast London. The Crystal Palace has long since burned down but the park is still there and hosts a collection of life-sized dinosaur statutes, built in the 19th century (and modeled on what science then believed dinosaurs looked like), a pretty good maze (you'll spend at least 30 minutes looking for the exit), a pond with paddle boats, an athletics track and the National Sports Centre (housing one of London's few 50 meter pools).
Round off your geocache hunt with a visit to one of the area's many cafes and restaurants and pick up a copy of Tom Brown's 'Strange Air' for an imaginative take on the park and it's history.