This is cup-and-ring art, a form of prehistoric carving found across Atlantic Europe and Ireland, typically associated with the Bronze Age, in which shallow depressions and concentric circles are picked into stone surfaces by hand. The meaning of these motifs remains genuinely unknown. What makes this example quietly arresting is not its scale or complexity but its precision of placement. The motif sits towards the south-eastern end of the boulder's upper face, which tilts gradually upward to the north-east, and from that elevated end the stone looks out across the Behy River Valley, past Cromane and Castlemaine Harbour, all the way to the Dingle Peninsula.

The carving itself is uneven in execution. The ring enclosing the cupmark is formed from a series of small pickmarks, each about three millimetres wide and only a millimetre deep, and the technique varies across the surface: tightly and clearly worked along the western and southern arcs, then more loosely spaced to the north and east, where the line becomes harder to trace. Whether this reflects a single interrupted session of carving, or the work of more than one hand, is impossible to say. Close to the decorated boulder, separated by a short low wall of just two stones, lies a small drystone enclosure roughly two and a half metres in diameter and about a metre high. Drystone construction, which uses no mortar and relies entirely on the careful stacking of stone, is common across this part of Ireland and spans many periods. The enclosure's south-western side is formed by the vertical face of a large squarish boulder, its upper surface partly buried under accumulated peat. The relationship between the enclosure and the carved boulder is not documented, and it would be unwise to assume one.