A souterrain, to give it its proper name, is a man-made underground structure, typically stone-lined, built during the early medieval period and associated with ringforts. They served variously as storage spaces, refuges, or escape routes. This one sits within a ringfort that has itself been levelled, leaving no visible trace of either structure above ground.

The only record of anyone noting the entrance belongs to a Broker, who in 1937 wrote that there was a flag in the centre of the site with a hole that had already been covered over by that point. That single line is the sum of what is formally known. The ringfort it belonged to has been assigned a separate record, but the earthworks are gone. The souterrain beneath, if it survives at all, lies under whatever the land has become since.