"Junkies Go Home:" Waste Woods

Across the road from Norwich's 'secret garden,' the restored nineteenth century Plantation Gardens, lies a strange scrap of forgotten waste woodland I assume was once part of the same quarry. (The famous 1988 image of the double decker bus sinking into a collapsed hole in the road, courtesy of instabilities caused by medieval chalk mines beneath the surface, happened mere yards away). I don't know what this chunk of crumbling wall is, or how many years it has stood. I like this place as a weird grotty twin to the Plantation Gardens.