On a south-facing slope in the Parish of Rathgormuck, with a stream running roughly west-east along its southern edge, a megalithic structure sits within a place that carries the early ecclesiastical name Cíll Eoghan, meaning roughly the church or cell of Eoghan. The overlap of prehistoric stonework and early Christian naming is quietly suggestive: sites that drew people for religious or ceremonial purposes in one era had a way of drawing them again in another.

The site is associated with a cairn, a mound of stones that in Irish contexts often marks prehistoric burial or ritual activity. Writing in 1948, P. Lyons noted a substantial stone measuring approximately five feet by five feet by one and a half feet that once stood just to the north of the cairn, and considered it a possible megalithic structure in its own right. Megalithic simply means built from large stones, usually without mortar, and the term covers a wide range of prehistoric forms. That particular stone no longer survives, and later assessment has judged the megalithic classification unlikely in any case. The ecclesiastical place-name Cíll Eoghan is recorded by Rev. P. Power in his study of the placenames of the Decies, the old territorial designation for much of County Waterford, published in its second edition by Cork University Press in 1952. Between Lyons and Power, the site attracted the attention of two careful local antiquarians working in the mid-twentieth century, which at least establishes that it was once considered worth the detour.