The enclosure at Curraheen sits on flat upland ground, and most of it has been ploughed, grazed, and generally persuaded back into the landscape to the point where the north-western and western sectors have vanished entirely at ground level. What makes it quietly strange is the way the surviving portions tell the story of that gradual erasure, each quadrant at a different stage of disappearance.

An enclosure of this type, a large sub-circular earthen ring, would originally have consisted of a raised bank and an accompanying fosse, which is simply a ditch dug to create or reinforce that bank, sometimes with a second outer bank and fosse beyond it. At Curraheen, the northern quadrant, lying to the east of a later north-south field boundary that cuts straight through the monument, preserves the most complete cross-section of this original arrangement: a scarp nearly five metres wide, an inner fosse close to four metres wide and roughly a third of a metre deep, an outer bank nearly six metres wide, and a shallower outer fosse beyond that. The southern quadrant survives only as a barely perceptible low bank, two metres wide and just twelve centimetres high, little more than a ripple in the field. Complicating the picture further, curving field boundaries in the east and south-east sectors appear to have fossilised parts of the old enclosure line, reusing its curve as a convenient property edge. One of these boundaries, running along the southern sector, includes an earthen bank with stone revetment, though the second edition Ordnance Survey six-inch map of 1906 shows traces that are no longer legible on the ground today. An Air Corps aerial photograph captures the monument from above, where the full sub-circular outline becomes readable in a way that a ground-level visit cannot quite reveal.