The structure in question is a souterrain, a type of man-made subterranean gallery common in early medieval Ireland, typically stone-lined and used for storage, refuge, or both. Its existence here rests entirely on local knowledge, passed down rather than recorded in any physical evidence that surveyors have managed to reach.

When the site was inspected in 1991, the ringfort itself, an enclosed settlement of the kind built across Ireland from roughly the early Christian period onwards, was so heavily overgrown that the interior could not be accessed at all. The dense vegetation made it impossible to locate the souterrain, or to determine with any confidence whether one is genuinely present. The feature therefore sits in an unusual category: a possible archaeological monument within another monument, its existence neither confirmed nor ruled out, preserved as much by neglect as by anything else.