The site is Knocknaglogh Fort, named as such on the Ordnance Survey six-inch maps, and it belongs to a category of burial place once widespread across Ireland: the cillín, or cilleen, an unconsecrated ground used for those whom the Church would not receive into consecrated soil. Unbaptised babies were the most common occupants. The theology that drove this practice has long since softened, but the places themselves remain, quiet and usually unmarked.

At Knocknaglogh, the markers are barely there at all. A few small stones, moss-covered and scarcely breaking the surface, are said to indicate individual graves. In the western half of the ringfort, a roughly square hollow, approximately 2.7 metres across and 0.2 metres deep, is also associated with burial, and small stones were once visible around its edge. A rath, to use the Irish term, is a ringfort: a roughly circular enclosure defined by earthen banks, built during the early medieval period and used as a farmstead. That such places were later adopted for cillín burials was not unusual. They sat outside the Church's jurisdiction, already set apart from ordinary agricultural land, and carried their own older sense of boundary and enclosure. The community found a use for that separateness.

Nothing here is signposted or formally presented, and the grave markers are so slight that a visitor unfamiliar with what to look for could walk the interior without noticing them at all. The moss-covered stones and the shallow hollow in the western half are the only physical traces of what local memory has preserved.