A souterrain is an underground stone-lined passage or chamber, typically constructed during the early medieval period in Ireland, and used variously for storage, refuge, or as an escape route from a nearby settlement. Here, the hollow measuring roughly seven metres on its longer axis is most likely the collapsed remains of just such a structure, and the large limestone slabs lying displaced on the surface may once have served as the lintels spanning its roof.

What gives the site its particular interest is its setting. It sits within the north-eastern quadrant of what appears to be a cashel, a type of early medieval stone-walled enclosure that typically defined a farmstead or small defended settlement. The cashel itself is still under investigation, recorded as a possible example rather than a confirmed one. Close by lies a house site, suggesting that the souterrain was once part of a small but organised complex of domestic and protective structures. The site was noted on Tim Robinson's 1977 map, a cartographic resource well regarded for its careful documentation of archaeological and topographical features across the west of Ireland, which gives some sense of how long this quiet corner of Clare has been on the scholarly radar.