That arc, about two metres wide and tracing a circuit some thirty-five metres across, is most clearly legible from aerial photography, where it reads as the ghost of a rock-cut ditch, a trench once carved into the limestone itself. On the ground, the enclosure announces itself differently: along one side, the line of a field wall marking the boundary between the townlands of Cahermacnachtan and Lissylisheen takes an abrupt, telling kink, the living boundary quietly inheriting the geometry of something far older.

What makes this site particularly arresting is the structure sitting within it. In the northern portion of the enclosure's interior lies a wedge tomb, a type of prehistoric megalithic monument found across the west of Ireland and typically dating to the late Neolithic or early Bronze Age, built from large slabs arranged so that the chamber tapers in both height and width from one end to the other. The enclosure around it belongs to a far larger and longer-lived landscape: a multiperiod field system stretching from Lissylisheen all the way to Lisdoonvarna, one of the more remarkable expanses of ancient land management in the Burren. The plateau on which all of this sits drops away sharply to the east, opening wide views from the north-west around to the south, a position that would have made the site conspicuous and oriented within the surrounding country in ways that were almost certainly deliberate.