VIDEO: Horsham Mystery Tour 3

This site is fairly remote, in a small patch of light woodland in Horsham district.

A rusty discoloured line runs up a nearby tree trunk, providing a hint as to this structure’s purpose.

The main visible feature is a large buried chamber, which has collapsed under the weight of the earth above.

An exit, connected to the main chamber by a section of sewer pipe, is readily visible from the nearest footpath.

Don’t know what it is? Don’t worry - the people who built it didn’t know either.