Roughly circular and barely a metre across, it rises only about sixty centimetres at its highest point, built from flat slab-type stones that have slowly shifted and settled over what is likely a very long span of time. What makes it worth pausing over is a surviving trace of kerbing along its south-eastern arc, suggesting that whoever constructed it took care to define its edge deliberately. Kerbing, in the context of prehistoric cairns, refers to an outer ring of upright or closely set stones used to retain the cairn's core material and give the monument a finished boundary. Even in ruin, that intention is faintly legible here.

Cairns of this kind are found across Ireland and generally date to the prehistoric period, though without excavation it is difficult to assign a more precise date to any individual example. They could mark burials, territorial boundaries, or prominent points in a wider ritual landscape. This particular one sits among outcropping rock and heather on the hilltop between the townlands of Carrigacat and Milleen, positioned with a clear east-to-west view over Dunmanus Bay. Whether that prospect was incidental or intentional is impossible to say now, but the placement is striking. Small, unexcavated, and without obvious signage or formal protection in the immediate area, it is exactly the kind of monument that passes unnoticed by most people who move through the surrounding countryside.