The ground gives nothing away. No earthwork rises above the vegetation, no obvious ring of stone breaks the surface of the flat, poorly drained terrain. The only reason anyone knows it is there at all is because a pair of aerial photographs taken in 1973 revealed its outline from above, the kind of ghostly crop or peat mark that only becomes legible when you leave the ground entirely.

Circular enclosures of this kind are found across Ireland in considerable variety. Some are the remains of ringforts, the enclosed farmsteads that served as the basic unit of rural settlement throughout the early medieval period. Others may be earlier, representing prehistoric activity whose precise nature is difficult to determine without excavation. At Gortagullane, the bog itself has done the work of preservation and concealment simultaneously, keeping the buried features intact while preventing any surface expression from surviving. About thirty-five metres to the north-west of the enclosure, a large depression in the ground appears to be a limestone quarry, suggesting that the immediate area was worked at some point, though the relationship between that quarrying activity and the enclosure remains unclear.