This is a souterrain, an underground structure of the early medieval period, typically built from drystone walling and used for storage, refuge, or both. What makes this one quietly interesting is the layout: a small chamber just inside the entrance, with a further passage running off to the north-east, suggesting a deliberately planned interior rather than a simple pit.

The opening was reportedly found about 6.5 metres from the western bank of the enclosure within which it sits. That positioning, close to the perimeter rather than the centre, is consistent with how souterrains were often integrated into ringforts or enclosed settlements, where they could be reached quickly from a dwelling but remained concealed from anyone outside the bank. A. O'Sullivan and J. Sheehan documented the site in their 1996 archaeological survey of South Kerry, published by Cork University Press, which remains one of the most thorough records of the Iveragh landscape.