The gap reveals a drystone souterrain, an underground stone-lined passage or chamber built without mortar, of the kind that appear across early medieval Ireland as places of refuge, storage, or concealment. What is visible here seems to be the terminal end of a gallery or connecting passage. The structure below is not accessible, and the aperture is small, but the fact of it is quietly arresting.

The souterrain sits within the north-eastern quadrant of a moated site, a class of enclosure typically associated with Anglo-Norman or later medieval settlement, consisting of a raised platform or habitation area surrounded by a water-filled or wet ditch. That combination, a souterrain embedded within a moated enclosure, points to a layered history of occupation on this rise. Somewhere toward the centre of the same enclosure, a large stone breaks the surface of the pasture, and it may belong to the same subterranean structure, hinting at greater extent underground than the single visible gap suggests. To the south-west, the traces of a house site complete a cluster of features that together describe a settlement with considerable depth in time, even if most of it remains buried and unexcavated.