The one at Knockbarry, in north County Cork, is not. What survives is a semicircle, a straight edge running roughly north to south for just under thirty metres, with the bank curving out to the west by about seventeen metres before trailing off into a low natural scarp. There are no traces of any eastern arc that might once have closed the shape into a full circle, and the eastern boundary is simply a roadway. Whether this was always an open, D-shaped form or whether the missing half was erased long ago, the ground offers no clear answer.

The enclosure sits in level pasture within the demesne of Highfort House, a setting that places it in the managed landscape of a landed estate rather than the open farmland where similar earthworks are more commonly found. The bank itself is modest by any measure, rising only about twenty centimetres on its inner face and thirty-five centimetres on the outer, the kind of low earthen boundary that survives more through neglect than through any particular effort at preservation. Three mature beech trees have rooted along its length, their presence both marking the line of the bank and, over decades, contributing to its slow distortion. Enclosures of this kind, sometimes interpreted as the remains of early medieval settlement boundaries or as cattle enclosures, are scattered across the Cork countryside, but the incomplete and ambiguous geometry here makes Knockbarry a harder site to read than most.