Sitting on a gentle south-facing slope, the oval enclosure at Kilmaculla measures roughly 90 metres across its longest axis and about 60 metres across the shorter, defined partly by an earthen bank and partly by a fosse, a defensive ditch, whose outline only becomes clear as a cropmark in aerial photography. When J. Monk photographed the site from the air in March 1998, that ghostly fosse line confirmed what the surviving banks alone could not fully express: the full circuit of an early ecclesiastical enclosure, the kind of roughly circular or oval boundary that was typically drawn around an early Irish monastic or church site to separate sacred ground from the surrounding landscape.

Power, writing in 1932, described it as a space of perhaps an acre or more, roughly circular in outline, left untilled in an arable field, and he connected Kilmaculla with the Cill Mochuilli recorded in the Crichad an Chaoilli, a medieval territorial survey of the Fermoy district. That text identifies the site as a subsidiary church of the Tuath O Cuscraidh. The saint associated with it, Mochuille, was said by Grove White in the early twentieth century to have been a sixth-century contemporary of St Molaga, whose memory survives in the nearby place-names of Aghacross and Labbamolaga. Inside the enclosure, later linear banks have subdivided part of the interior into a burial ground, and two bullaun stones survive within the complex. Bullauns are boulders or stones with one or more artificial cup-like hollows ground into them, found frequently at early medieval ecclesiastical sites across Ireland, their exact liturgical or practical function still debated. One sits on the north-eastern bank of the main enclosure; the second is on the southern linear bank that now borders the burial ground. The interior itself is slightly raised and slopes gently southward, a subtle topographic feature that can signal long centuries of human activity accumulated beneath the turf.