What opened up was not a badger run or a collapsed drain but a souterrain, one of the underground passages and chambers built in early medieval Ireland, typically associated with nearby settlements and thought to have served as refuges, storage spaces, or both. The collapse left an opening roughly a metre across and almost a metre deep, dropping into a chamber of about two metres in length whose curving roof appears to have been cut directly from the clay rather than lined with stone, which is relatively unusual.

The site sits on a slope looking out over rolling countryside towards the mouth of Glandore Harbour, a quiet position that would once have placed it within reasonable distance of whatever farmstead or ringfort it served. Local information suggests there are traces of a stone wall along one side of the chamber, which may indicate a construction shaft that was deliberately blocked after the souterrain was completed, a common enough practice once the underground work was finished and concealment became desirable. About twenty-five metres to the east stands a separate monument, a standing stone, whose relationship to the souterrain is unrecorded but whose proximity is unlikely to be entirely coincidental. The souterrain itself has been largely filled in for safety reasons and is not accessible, meaning the site is now more a matter of knowing something is there than of seeing it directly.