The story is local tradition rather than documented history, but it points to something real: the strong likelihood that this ringfort once contained a souterrain, an underground stone-lined passage or chamber used in early medieval Ireland for storage, refuge, or both. Burnt stones found near the site add a further layer of ambiguity, suggesting activity whose nature remains unresolved.

The cashel, a ringfort built from stone rather than earthen banks, sits atop a low hillock in pasture at Cahernacrin, Co. Cork. Its circular enclosure measures roughly 30 metres in diameter, defined by a collapsed stone wall that shows signs of partial rebuilding in its upper courses. A shallow external fosse, a defensive ditch, runs along the south-west side, and there is a gap in the wall at the same point, about 1.5 metres wide, which likely marks the original entrance. Two large flagstones, each around 12 feet in length, lie on the south-south-east side and may have served as entrance stones. Four stone-faced field boundaries radiate outward from the site, suggesting the fort once sat at the centre of a deliberately organised agricultural landscape, its enclosure and the surrounding fields forming a coherent early medieval farmstead.

The approach through pasture means the earthworks and stonework are best read at close range, where the distinction between original fabric and later rebuilding becomes visible. The radial field boundaries are worth following outward from the fort itself, as they give a sense of how the surrounding land was once divided and managed in relation to this central enclosure.