It is not quite a wall, not quite a ruin in any tidy sense, and its purpose remains genuinely unresolved. What survives is a semicircular sweep of collapsed stonework, open to the south, its remaining height barely reaching thirty centimetres in places. The arc encloses a penannular space, meaning a near-circular area with a deliberate gap or opening, and sits on a gentle slope that looks northward over a wide spread of boggy ground, with the ground dropping away to the east towards a small stream.

The structure is associated with a cluster of booley huts nearby, the remnants of a seasonal farming practice in which people and their livestock moved to upland grazing areas during summer months. Booley huts, small temporary shelters used during this transhumance, are found across the Irish uplands and represent a way of life that persisted well into the post-medieval period. The arc of wall at Cregganroe merges at its northern end with a north-to-south field wall, part of a broader field system tied to that same cluster of huts. Whether the arc is the surviving northern half of what was originally an oval enclosure, roughly five metres east to west and at least six metres north to south, or simply another booley hut in a more ruinous state than its neighbours, is not possible to say with any certainty. The stones themselves offer little to settle the question; they sit in an irregular, partly buried setting that resists confident dating or classification.