The roughly circular earthwork, about 22 metres across, is defined by an earthen bank that stands around a metre above the interior ground level, with gaps at the north-east and south-west. Trees and bushes now obscure much of it, so the enclosure can be easy to miss if your eye goes straight to the more obvious stones at its centre.

What lies beneath the surface adds another layer. A limited excavation carried out in 1998, the findings published by O'Brien in 2000 and 2004, uncovered a steep-sided fosse, essentially a ditch, running directly inside the enclosing bank. At its widest the fosse measured 3 metres across at the top and narrowed to 1 metre at the base, with a depth of 2.5 metres, dimensions that suggest considerable effort and probably some ceremonial or boundary-marking purpose beyond simple livestock management. The excavation also confirmed that the enclosure is prehistoric in date, placing it in the same broad horizon as the stone circle it contains. That circle occupies the centre of the enclosure, and roughly 14 metres to the south stands a pair of standing stones, a separate but presumably related feature. The grouping of enclosure, stone circle, and standing stone pair in such close proximity points to a site that was used and added to over time, each element in loose conversation with the others, all of it set against a westward view toward Killarney and the Macgillycuddy's Reeks.