It is kidney-shaped, barely a metre tall, and would be easy to walk past without a second thought. What it represents, however, is a technology that saw repeated use across Ireland for well over a thousand years during the Bronze Age: a fulacht fia, essentially an ancient outdoor cooking site where water was heated by dropping fire-heated stones into a trough until the water boiled, and meat could be cooked. The characteristic mound is the accumulated debris of those cracked and shattered stones, discarded after each use and piled up over generations.

The mound at Cloonmweelaun measures roughly 6.8 metres north-west to south-east and 6.2 metres north-east to south-west, with a shallow depression on its southern side, the likely location of the original trough. The proximity to both bogland and a running stream is entirely typical of how these sites were chosen; access to a reliable water source was essential, and low-lying, wet ground appears to have suited the purpose well. Thousands of fulachtaí fia have been identified across Ireland, making them among the most common prehistoric monument types in the country, yet individually they remain easy to overlook, modest in appearance and unannounced by any dramatic outline on the landscape.