The structure is a souterrain, a type of dry-stone underground chamber or tunnel constructed during the early medieval period in Ireland, typically associated with nearby settlement sites. They served various purposes, among them storage, refuge, and ventilation for dwellings above ground. This particular one has, for now at least, successfully resisted inspection.

The souterrain sits in the south-eastern quadrant of a rath, a circular earthen enclosure of the kind that was once a common feature of the Irish farming landscape, used as a defended homestead from roughly the sixth to the twelfth centuries. The rath here, recorded separately in the Cork sites inventory, is itself obscured by the same dense vegetation that swallows the souterrain. Knowledge of the entrance stone comes only from local information passed on by people in the area, not from direct archaeological observation. When surveyors working on the county inventory attempted to locate the covering stone, the overgrowth made it impossible to confirm its position. The site exists, in a sense, on trust.

Anyone curious enough to visit should be prepared for the real possibility that there is nothing visible to find. The vegetation is described as dense, and there is no reason to assume it has thinned in the years since the inventory was compiled. What the site does offer, even in its inaccessible state, is a particular kind of historical atmosphere: a known unknown, a recorded absence, a passage into the ground that the landscape has quietly refused to give up.