This is a fulacht fia, a type of prehistoric cooking site found in considerable numbers across Ireland, typically Bronze Age in origin. The standard interpretation is that stones were heated in a fire, then dropped into a water-filled trough to bring it to the boil, used for cooking meat. The mound itself is the accumulated waste of that process, the cracked and fire-shattered stones discarded after repeated use.

The Fahee example is small by any measure, an irregularly oval mound roughly 9.8 metres along its longer axis and 6 metres across the shorter, with a subcircular depression about 2.5 metres in diameter sunk to the west of centre. That hollow is likely the trough, or at least its echo in the ground. What gives the site its particular interest is the density of similar monuments immediately around it. About 12 metres to the north, a scatter of burnt stone on exposed bedrock may represent another fulacht fia, too eroded to retain its original shape. And within roughly 200 metres to the north-west, three further fulachtaí fia have been recorded. The clustering is notable. Whether these sites were used simultaneously, by the same community returning across seasons, or were accumulated over long periods by unrelated groups, is not something the surface evidence alone can answer. The site was reported independently by Tom Coffey and Donncha Ó Dúlaing, and was listed in the Record of Monuments and Places in 1996 as part of this broader concentration.

The low-lying, damp setting is entirely typical of the monument type. Fulachtaí fia are almost always found near water, and the presence of two streams, one to the south-south-west and another to the north, would have made this spot practical for exactly the kind of repeated, water-dependent activity the sites are associated with. The higher ground rising to the north, east, and south-east frames the hollow in a way that makes the choice of location feel deliberate, sheltered from exposure while remaining close to the raw materials the process required.