It is roughly 18 metres across, flat-topped, and defined on the south-western to north-western side by a slight scarp, with a broad low slope completing the circuit elsewhere. The elevation gives views southward across falling ground and northward over a gently rising landscape. Easy to walk past, easy to mistake for a natural feature of the terrain.

Locally, this feature is known as "the lios", a term that points toward its probable origin. A lios, in Irish tradition, is an earthen enclosure, often circular, associated in folk memory with the fairy mounds or ringforts that punctuate the Irish countryside. Ringforts, built predominantly between the early medieval period and around the twelfth century, served as enclosed farmsteads, their earthen banks defining a protected domestic space. Whether this particular enclosure functioned in that way, or belongs to a different phase of activity altogether, is not recorded. What survives is the shape, the local name, and the knowledge that people living near it considered it worth remembering and worth naming.