What makes it worth a second look is not its height, a modest 0.65 metres, but the circular depression carved or worn into its western face: roughly 17 by 15 centimetres across and 12 centimetres deep, a deliberate hollow whose purpose no one has satisfactorily explained. Cup marks of this kind appear on megalithic stones across Ireland and Britain, and while they are among the most common forms of prehistoric rock art, their function remains genuinely unclear. Ritual offering, boundary marker, astronomical notation: theories accumulate without settling.

The slab itself is oriented roughly north to south and measures 1.3 metres at its base, with a straight upper edge that suggests it was shaped rather than simply placed. A second, longer slab leans heavily northward against its eastern face, and some 2.5 metres further north lie a couple of prostrate slabs, largely swallowed by sod. Whether these elements once formed a coherent structure, perhaps the collapsed remains of a portal tomb or a kerbed cairn, is difficult to say in the absence of excavation. The Iveragh Peninsula, of which this slope forms a part, is unusually dense with prehistoric remains, and the survey work of A. O'Sullivan and J. Sheehan, published by Cork University Press in 1996, catalogued this site among hundreds of others scattered across that landscape.