It is easy to walk past such a depression without a second thought, yet that unremarkable dip in the earth hints at a whole subterranean dimension to a site that has been quietly present in this landscape for well over a thousand years.

The souterrain sits within a univallate ringfort, meaning a roughly circular enclosure defined by a single surrounding bank, in this case composed of earth and stone. Ringforts were the most common form of rural settlement in early medieval Ireland, and the bank at Garrynagore is described as well defined, suggesting the enclosure has survived in reasonably legible condition. The possible souterrain lies in the northern sector of the interior. Its existence is inferred from the surface depression rather than confirmed through excavation, which means the full extent and character of whatever lies beneath remains unknown. The site was documented by C. Toal in the North Kerry Archaeological Survey, published in 1995 through Brandon Press in Dingle in association with FÁS, and catalogued as entry number 749 in that volume.