It measures eleven metres north to south, nearly nine and a half metres east to west, and rises to about eighty centimetres at its highest point. The opening is over six metres wide. To a passing eye it might look like a natural rise in the ground, or old field clearance. What it actually represents is something far older and more particular.

This is a fulacht fia, a class of prehistoric cooking site found in enormous numbers across Ireland, typically Bronze Age in date. The standard interpretation is that stones were heated in a fire and then dropped into a water-filled trough to bring the water to boiling point, cooking meat wrapped in straw or placed in the water directly. The characteristic horseshoe mound is made up of the discarded burnt and shattered stones, built up over repeated use into the shape visible today. The proximity to a stream is typical; access to water was essential to the whole process. This particular site was recorded as early as 1934, when Bowman noted it in the literature as lying on land then belonging to a M. Murphy. That early record is one of the reasons it can be identified with reasonable confidence as a genuine prehistoric site rather than later field debris.