What makes this particular cashel quietly remarkable is not just its own survival but what surrounds it: within roughly a hundred metres in each direction, at least three other monuments cluster together, including two further cashels and a souterrain. A cashel is a stone-walled ringfort, the Irish equivalent of the more common earthen rath, and this concentration of them in a single area suggests a landscape that was once densely organised and purposefully settled, even if the ground today gives little immediate sense of that former intensity.

The structure itself is a near-perfect circle, measuring 26.2 metres across in both directions, defined by a spread of stone and drystone walling that still stands between 0.8 and 1.4 metres high in places. The outer wall-face remains well defined, though scrub growth and collapsed material obscure much of it. Inside, accumulated debris has built up to the level of the inner edge of the stone spread for most of the circuit, except at the southern side, where the wall rises a clear 0.8 metres above the interior floor. The site was recorded on Ordnance Survey six-inch maps in both 1840 and 1916, marked with hachures indicating an earthwork or enclosure, and it sits within what has been identified as an extensive prehistoric and early medieval field system on the surrounding hillside. By 1996, it was formally listed in the Record of Monuments and Places, though catalogued at that point simply as an enclosure rather than a cashel, a classification that has since been revised.

The nearest monument, another cashel, lies just 17 metres to the south-east, with a further enclosure about 55 metres beyond that in the same direction. To the south-west, at around 95 metres, sits a second cashel accompanied by a souterrain, an underground stone-lined passage typically associated with early medieval settlement and used variously for storage, refuge, or both. The clustering of all these features in an unimproved pocket of ground beneath Ballyganner Hill preserves something that improved farmland elsewhere has long since erased.