Roughly circular, measuring about 5.5 metres north to south and 5 metres east to west, and rising only half a metre from the ground, it is composed of burnt material, the accumulated debris of repeated prehistoric cooking. To its west lies a marshy area, and a tributary of the Slaheny River runs roughly 75 metres to the south, details that are not incidental.

This is a fulacht fia, a type of site found in considerable numbers across Ireland and dating most commonly to the Bronze Age. The term refers to a burnt mound, the heap of fire-cracked stones left behind after a cooking method that involved heating stones in a fire and plunging them into a water-filled trough to bring the liquid to a boil. The proximity to water was not accidental; a reliable source was essential to the process, and the marshy ground nearby would have made this spot well suited to the purpose. The mound itself is the slow accumulation of discarded, heat-shattered stone, of no further use once cracked by the thermal shock of repeated heating and cooling. A second fulacht fia lies roughly 230 metres to the northwest, suggesting the area saw sustained use over time, or perhaps use by different groups across a long span of years.