This one, sitting on a north-south ridge in north Cork just above a copse of trees, does something less expected. Rather than a complete ring, it forms a U-shaped arc, open to the west, with the ground falling away steeply to the southeast. The shape is not a ruin of something once complete; the southern arm of the arc connects directly into a field fence running north to south, suggesting the opening to the west was always part of the design, perhaps functioning as an entrance or as a deliberate integration with the surrounding landscape.

The earthen banks are low, as is common with sites that have been exposed to centuries of weathering and agricultural activity. The U-shaped arc measures roughly 37 metres along its north-northeast to south-southwest axis and 44 metres east to west, with an internal height of only five centimetres in places and an external height of around 20 centimetres. Adjoining the northern side of this arc is a separate D-shaped enclosure, about 21 metres across its main axis, enclosed by its own earthen bank standing a little higher, up to 30 centimetres on the exterior. The combination of a U-shaped and a D-shaped element sharing a boundary is not a standard arrangement, and it raises questions about whether both phases were constructed together or whether one predates or was adapted from the other. No excavation data appears to be available to settle the matter.