A souterrain, an underground stone-lined or earth-cut passage typically associated with early medieval settlement in Ireland, lies here not in a field or beneath open ground but under the fabric of a building, absorbed into the domestic landscape so gradually that most people nearby would have no reason to suspect it.

What is known of the interior comes from old photographs shared by a person identified only as L. Snodgrass, and those images show earth-cut chambers rather than the dry-stone-lined passages more commonly associated with the type. Earth-cut souterrains are less frequently documented, since they depend on the stability of the surrounding soil and tend to survive in fewer places. The photographs represent the most direct evidence available for what lies below, and without them the site would be largely a matter of inference from surface position alone. No excavation findings are recorded, and the precise extent or condition of the chambers remains unclear.