The one at Ballynamona in County Limerick has none. No fosse, no encircling bank on its platform, just a gently flattened earthen mound sitting quietly at the edge of a stream. That absence makes it quietly anomalous, a structure that fits the broad category of rath while shedding some of its usual features.

When O'Kelly recorded the site in 1942 and 1943, the mound measured around 120 feet, or 36 metres, across its overall diameter and rose to a greatest height of about five feet, roughly 1.5 metres. Even then, the stream, a tributary of the Camoge River, had already done its slow damage, eating away at the eastern side of the mound. The Camoge runs through this part of Limerick before joining the River Maigue, and the unnamed tributary here has been working at the earthwork for long enough that its eastern edge was already compromised when surveyors first looked closely at it in the early 1940s. The monument's outline remains legible on Digital Globe aerial photographs, which is often the clearest way to read earthworks that have been softened by centuries of weather and agriculture.

The site sits on a streambank, so the ground around it is likely to be soft and uneven, particularly after rain. Aerial imagery is genuinely useful here, since the mound reads more clearly from above than it does at ground level, where it can appear as little more than a gentle rise in a field. There is no formal access or visitor infrastructure, and the surrounding farmland means that any approach should be made with awareness of land ownership. For those interested in early medieval settlement patterns in Munster, the monument is a quiet data point, one of many such enclosures in the region, though its lack of a defensive ditch and its precarious position beside an eroding stream give it a slightly different character from the typical textbook example.