It is a fulacht fia, a type of prehistoric cooking site found in great numbers across Ireland, and this one follows the classic form almost exactly: a horseshoe-shaped mound wrapping around a central hollow, open on one side, positioned close to a reliable water source.

Fulachtaí fia, the plural form, are among the most common archaeological monuments in the Irish landscape, with thousands recorded across the island. The accepted interpretation is that they were used for boiling water, most likely for cooking meat, by heating stones in a fire and dropping them into a water-filled trough. The stones crack and shatter with repeated heating and cooling, and it is this accumulation of burnt, fragmented stone that forms the characteristic mound over time. The Camus example measures eight metres in length, six metres in width, and stands just under a metre in height, with an opening to the east of about one and a half metres. A stream runs to the west and north, which would have provided the water supply the process required. Some burnt material has been removed from the north-western side of the mound, though the structure otherwise remains largely intact, and the vegetation covering it has been cleared at some point, leaving the shape of the monument more legible in the field.