On a steep north-east-facing slope of the Comeragh Mountains, a near-perfect circle of heather sits in rough pasture, its outline so regular that it reads clearly from aerial photographs. This is a rath, the Irish term for a ringfort, one of the most common early medieval monument types in the country, typically built between roughly 500 and 1000 AD as an enclosed farmstead for a single family or small community. What makes this particular example quietly compelling is not its fame but its geometry: a roughly 45-metre-wide enclosure that has held its shape on an awkward, sloping hillside for well over a thousand years.

The site is defined by a stone-faced earthen bank, three to four metres wide, whose height varies considerably depending on which side of the slope you measure. On the eastern, downslope side the internal face rises only about 20 centimetres, while on the western, upslope side it reaches 1.6 metres internally and over two metres externally. This asymmetry is not accident or decay; it reflects the practical logic of building on a gradient, where the bank had to compensate for the fall of the land to maintain a level interior. Beyond the main bank lies an outer fosse, a defensive ditch roughly five metres wide and up to 1.8 metres deep on the western side, which diminishes to a narrow berm on the north-east to south-east arc. Traces of an outer bank survive most clearly to the north-north-east and south-south-east. Entry was through a dug-in ramp just 1.8 metres wide, set at the south-east. The ramp entrance, cut down into the ground rather than built up through a gap in the bank, is a detail that gives a sense of how carefully controlled access to these enclosures was intended to be.