At Ardkeen in County Tipperary, the evidence amounts to a shadow in a field: a possible cropmark, photographed from the air in 1976, which may or may not indicate a levelled enclosure beneath the grass. Walk the ground itself and there is nothing to see. The Ordnance Survey six-inch map records no pond, no earthwork, no feature of any kind at the relevant spot.

The site came to attention through aerial photographs taken by M. Moore in 1976, catalogued under reference ASIAP (45) 37. From altitude, the image suggested what might have been a pond, but subsequent examination of the mapped evidence found nothing to support that reading. The more likely interpretation is a cropmark, the kind of faint patterning that appears in dry summers when buried or levelled features affect how grass or grain grows above them, producing subtle differences in colour or height visible only from above. An enclosure in this context would typically mean a roughly circular or oval boundary, perhaps once defined by a bank and ditch, of the sort associated with early medieval settlement in Ireland. The location adds a layer of interest: the site sits on flat, reclaimed grassland in an upland area, with wide views in every direction, the kind of position that would have made practical sense to a community keeping watch over surrounding land.