Roughly 15 metres in diameter and positioned about 20 metres east of the Clashduff River, it overlooks Adrigole Harbour from a transitional point in the landscape, the kind of place where the practical and the territorial tend to coincide.

What makes the structure quietly unusual is the way its builders worked with what the land offered. The western and north-eastern stretches of the perimeter are formed not from quarried or carried stone but from a series of very large natural boulders, incorporated directly into the design. The remaining half of the circuit is constructed from field stones set on edge and arranged radially, a technique that gives the wall a kind of deliberate, upright geometry. The overall plan is triangular rather than truly round, which may reflect the irregular spacing of those founding boulders as much as any intended geometry. A possible entrance opens to the south. The enclosure has no firmly recorded date or function, and its purpose remains open: it could represent an early settlement boundary, a livestock enclosure, or something older still, its origins obscured by the same rough terrain that has kept the Healy Pass road a challenge for travellers across every era.