The entrance, once visible in the south-western corner of a field, led down into what local people called an artificial cave, the kind of structure an archaeologist would recognise as a souterrain: a deliberately constructed underground chamber or tunnel, typically built during the early medieval period using dry-stone walling or, in some cases, cut directly into bedrock. Souterrains are found across Ireland in considerable numbers, often associated with nearby settlement sites, and are thought to have served as places of refuge, cold storage, or concealment.

By 1987, when a local resident named S. O'Callaghan passed on details about the site, the entrance was already blocked, though the memory of what lay beyond it was still alive. Accounts held that it had once been possible to descend into the passage for quite some distance, suggesting a structure of reasonable extent rather than a shallow scrape. After that record was made, a large hay-shed was constructed over the area, and whatever surface trace remained disappeared entirely beneath it. The ridge itself survives, the field continues in agricultural use, and the souterrain, if it remains intact below ground, is now effectively inaccessible and invisible.