It is easy to walk past without registering what it is. But pressed against its south-western face, a cluster of smaller stones forms a cavity, the remnant of a prehistoric box-like burial chamber known as a cist. A cist is essentially a stone-lined grave, typically constructed from a few upright slabs capped with a covering stone, used to contain a crouched inhumation or cremated remains. Here, only the partial shell survives, one wall still standing, the rest reduced to rubble.

The antiquarian Thomas Johnson Westropp noted the structure in 1915, recording it as "the remains of small slab cist", which places it within a tradition of early fieldwork that was documenting such features across the Burren long before systematic survey began. The cairn sits within a large multiperiod field system at Ballyganner, suggesting this corner of Clare was not simply a burial site but a worked, inhabited, and organised landscape across several different eras. Roughly fifty-five metres to the west-north-west lies a cashel, a stone-walled circular enclosure associated with early medieval settlement, which speaks to the same layering of occupation. The underlying karst limestone, characteristic of the Burren, would have shaped how the land was farmed and how stone was sourced, since the surface here is essentially pavement beneath a thin skin of soil and grass.