A souterrain is an underground stone-lined passage or chamber, typically associated with early medieval settlement in Ireland, and thought to have served as a place of refuge, storage, or both. This one was uncovered by the landowner some years before it entered the archaeological record, found and then closed up again, so that today there is nothing on the surface to indicate it exists.

What the record does establish is that the souterrain system lies to the west of a univallate rath, a type of circular enclosure defined by a single bank and ditch, which was a common form of rural farmstead in early medieval Ireland. The two features together suggest a settlement of some depth and duration, the underground passages likely connected in function to the enclosed homestead beside them. The rath itself is catalogued separately, and the souterrain was documented as part of C. Toal's North Kerry Archaeological Survey, published in 1995, which systematically recorded sites across this archaeologically dense region of the county. Beyond that, the details are thin, partly because access to the site has effectively been closed off, and partly because no excavation appears to have taken place.