The site at Ahalisky is a rath, the Irish term for a ringfort, a class of enclosed farmstead built predominantly during the early medieval period and once numbering in the tens of thousands across Ireland. This one measures roughly 27 metres in diameter, its perimeter defined by an overgrown earthen bank standing about 1.3 metres high, with a natural scarp substituting for the bank along the southern side. Modest by any measure, and easy to walk past without a second thought.

The real interest lies beneath the surface. Within the northern half of the interior sits a souterrain, an underground stone-lined passage or chamber that early medieval communities used variously for storage, refuge, or both. This particular souterrain contains three ogham stones. Ogham is an early medieval script consisting of a series of notches and strokes carved along the edge of a stone, used primarily in Ireland and parts of western Britain to record names, most often in memorial or territorial inscriptions. Finding a single ogham stone reused inside a souterrain is not unheard of; finding three in one small ringfort in the Cork countryside is a different matter. Stones inscribed in ogham were sometimes repurposed as building material centuries after their original carving, which means these three may carry personal names or dedications that predate the construction of the souterrain itself, layering one era's text inside another era's architecture.