The site is a cashel, the Irish term for a ringfort built from stone rather than earth and timber, and whoever chose this particular knoll was making a deliberate statement about position. The ground drops steeply away on most sides, the spur itself provides the only natural approach, and the whole arrangement gives the impression of a place that wanted very much to control who came and went.

What makes this cashel quietly strange is that it appears on neither the 1838 nor the 1919 Ordnance Survey six-inch maps, which means it escaped the notice of cartographers working centuries after it was presumably built, and remained unrecorded on paper until relatively recently. The enclosure is oval, measuring roughly 18.5 metres from north-west to south-east and 13.5 metres across, and the drystone wall that once enclosed it, probably around 1.8 to 2 metres wide when intact, has long since collapsed into a low spread of large stones slumping inward and down the slope. The lowest two or three courses of the outer face survive along the southern arc, giving some sense of the original construction. There is no formal entrance, but narrow breaks in the wall at the south-east and north-west align neatly with the spine of the spur, the obvious walking routes up to the top. Inside, the ground is split-level, with a rough raised terrace along the western edge that may be a built feature, a consequence of wall collapse, or simply an exposed seam of bedrock; it is genuinely uncertain.

The knoll sits within a wider landscape that was itself intensively worked. Faint cultivation ridges, most likely from the eighteenth or nineteenth century, fill nearly every pocket of ground on the surrounding slopes, and the 1838 map shows a cluster of houses about 200 metres to the south-west. A low bank and shallow ditch some eight or nine metres from the cashel wall might be an outer defensive element associated with the enclosure, or it might simply be a later cultivation feature making use of a relatively stone-free patch of slope. The two possibilities sit unresolved alongside each other, which is part of what makes the site worth thinking about: the ancient and the recent have folded into the same rocky ground, and the eye must work to separate them.