That proximity is one of its more quietly arresting details: a structure that may be several thousand years old, positioned almost exactly on what would become a modern administrative line, though of course the line came long after the stones.

The cairn is circular, measuring roughly 9.8 metres east to west and 9.7 metres north to south, and rises to about 1.4 metres at its southern side. It has not survived undisturbed. A low drystone wall runs along its northern perimeter and appears to have been built from material robbed from the cairn itself, a common fate for prehistoric stonework in regions where good building stone was always in demand. There is also a quarry pit scooped into the cairn's surface, roughly 1.7 metres across and a metre deep, suggesting further opportunistic removal of material at some point. A few upright stones around the base may be the remains of a kerb, the ring of stones that would originally have defined and contained the mound's edge. The site sits on the first shelf of ground overlooking a col, a low pass between hills, to the south, with open views to the east and west but higher ground closing in from the north and south. It appears on Tim Robinson's revised edition of his Burren map, published in 1999.