This is a caher, the Irish term for a stone-walled ringfort, and where the vegetation pulls back at the southern side, the construction becomes legible: a rubble core faced on both sides with larger rounded slabs, still standing to around 65 centimetres on the outside. The interior measures just under twenty metres across, north to south and east to west, and two later field walls cut across it, evidence that the enclosure was repurposed for agricultural use long after its original function had been forgotten.

Ringforts of this kind were the dominant settlement form of early medieval Ireland, typically dating from the period between the fifth and twelfth centuries, and several thousand survive across the country in varying states of preservation. The Iveragh Peninsula in south Kerry has an unusually dense concentration of them, as documented by archaeologists Aidan O'Sullivan and Jerry Sheehan in their 1996 survey of the region. The entrance to this particular example is at the south-east, where two upright jamb stones stand roughly ninety centimetres apart and about the same height, framing a gap that once marked a deliberate threshold between the protected domestic space within and the landscape outside. A large flat slab lies prostrate just east of the entrance, possibly a fallen element of the original structure.

The setting itself adds a layer of context that the overgrowth cannot entirely obscure. The site commands a clear view south-westward over Darrynane Bay, the stretch of coastline associated with Daniel O'Connell, whose family home at Derrynane House lies nearby. Whoever built this enclosure chose the position carefully, as early farmers and their families so often did, balancing shelter, elevation, and visibility in equal measure.