This is a prehistoric cairn, a type of funerary or commemorative monument built by heaping stone into a mound, and it has been slowly swallowed by the blanket bog around it. Measuring roughly 3.5 metres east to west and 3.3 metres north to south, and rising only about 40 centimetres at its highest point, it is modest in scale, and many of its constituent stones are now grassed over, their edges softened by centuries of peat accumulation.

What makes this particular cairn quietly compelling is less its own dimensions than its context. It does not stand alone. Approximately 60 metres to the south-east, another cairn occupies the same rough hill grazing and bogland, suggesting that this slope was, at some point in the distant past, a place of deliberate, repeated human attention. Paired or clustered cairns of this kind are known elsewhere in Ireland, though their precise relationship, whether familial, ceremonial, or territorial, is rarely recoverable. The blanket bog that now partially conceals these stones is itself a post-prehistoric development in much of the Irish uplands, meaning the cairn was almost certainly more visible when it was first constructed, sitting in an open landscape that has since been transformed by millennia of peat growth.