A souterrain, the dry-stone underground passage or chamber that early medieval Irish communities built for storage, refuge, or both, once lay within a now-vanished enclosure here. It is gone, not through the slow attrition of centuries but through a deliberate, practical act: somebody needed building materials and the souterrain provided them.

The record of that act comes from a 1914 observation by a researcher named Neary, who noted that the landowner had used the large flags of the souterrain for building purposes. Souterrains were typically lined and roofed with substantial stone slabs, which made them attractive quarries for later construction once their original function was no longer valued or understood. By the time Neary documented the site, the damage was already done. No visible surface trace survives today, meaning the enclosure that once contained the structure has also disappeared from the landscape.