On a south-facing slope in Clondonnell, County Waterford, a circular patch of grass sits quietly in the landscape, measuring about 27 metres across. What makes it odd is what is absent. There is no fosse, the defensive ditch that typically surrounds an enclosure of this kind, and no visible entrance. It is defined instead by two scarps, essentially low earthen steps cut into the hillside, one running along the uphill arc from west through north to east, the other a scrub-covered bank on the downhill side reaching up to about one and a half metres in height. Together they describe a circle, but one that gives very little away about its original purpose.

Enclosures of this general type are scattered across Ireland and can date from the prehistoric period through to the early medieval, sometimes serving as settlement sites, sometimes as enclosures for livestock, and occasionally with ritual or funerary associations. Without a fosse and without a clear entrance, this particular example resists easy classification. The asymmetry of the earthworks, an internal scarp on the uphill side and an external bank on the lower, suggests the builders were working with the natural slope and using the hillside itself as part of the enclosure's structure, rather than constructing a uniform ring from scratch. That kind of practical adaptation is common in Irish field monuments but it does complicate any attempt to assign a confident function or date.