No wall survives above ground, no earthwork interrupts the pasture; what marks this place out is a cropmark, the differential growth of grass or grain over buried features that becomes legible only from the air, under the right conditions of drought and light.

The cropmark, photographed in July 1989 as part of an aerial survey programme, outlines the fosse, or defensive ditch, of a roughly circular enclosure approximately forty metres in diameter. A fosse of this kind would originally have surrounded a ringfort or similar enclosed settlement, the ditch providing both a physical barrier and a source of spoil for an internal bank. Ringforts are among the most common monument types in the Irish landscape, with tens of thousands recorded across the country, the majority dating to the early medieval period, roughly the fifth to twelfth centuries. Most served as farmsteads for a single family or kin group rather than as military fortifications in any formal sense. What makes Kilcummer quietly interesting is the additional detail: a vaguer, more diffuse cropmark immediately to the north-east hints at a second enclosure nearby, suggesting the possibility of a paired or clustered settlement, though the evidence is too indistinct to be certain.