Partially hidden within dense scrub and looking out over the Glen of Clab below, it consists of two sidestones and a capstone, the whole thing no more than a metre and a half in any direction. The capstone is slightly raised at the front, giving the structure an odd, tilted profile that only adds to the uncertainty about what it actually is.

The confusion over its identity is the most interesting thing about it. Researcher Keegan, writing in 2016, described it as a possible cist, which is a type of small stone-lined burial box typically associated with prehistoric interments, often built to hold a single crouched body or a cremation deposit. The east sidestone measures 1.35 metres, the west 1.65 metres, and the capstone runs to 1.62 metres in length and 0.6 metres in width. But Keegan also raised the possibility that it could be a small souterrain, an underground or partially underground passage built during the early medieval period, generally for storage or refuge. The two interpretations are quite different in terms of age and purpose, and the structure sits ambiguously between them. It lies within a field system that spreads across the broader Termon plateau, suggesting the landscape around it has been worked and organised over a long period, though the structure itself remains unexcavated and unresolved.