The small opening that once led into it has been filled in, leaving no visible trace of what was there. That quiet erasure is, in its own way, the most interesting thing about the site.

A souterrain is an underground passage or chamber, typically built during the early medieval period in Ireland, often associated with ringforts and thought to have served as a place of refuge, storage, or concealment. In 1939, the archaeologist P. J. Hartnett noted the opening to this one, describing it as sitting immediately inside the eastern rampart of the enclosing earthwork. His brief record, published that year, is the only real documentation of what was there. The ringfort itself survives, a circular raised enclosure of the kind built by farming families across Ireland roughly between the sixth and tenth centuries, but the souterrain entrance has since been closed off, whether deliberately or through natural silting and collapse is not recorded.