This is a fulacht fia, a type of prehistoric cooking or processing site found in extraordinary numbers across Ireland, typically identified by the distinctive horseshoe-shaped mound of burnt and shattered stone left behind after repeated heating and quenching in water. This particular example measures roughly 4.5 metres in length and 5 metres wide, rising to only about 0.3 metres at its highest point, with a 2-metre opening facing north-east.

What makes the location quietly interesting is that it does not sit alone. Around 30 metres to the north-west lies a second fulacht fia, suggesting that this stretch of wet ground was visited and used repeatedly, perhaps by the same community across generations. Fulachtaí fia are generally dated to the Bronze Age, though some examples span a wider period, and archaeologists have proposed various uses for them over the years, from meat-boiling and textile processing to brewing. The marshy setting here is typical; these sites almost always occur near water or in low-lying damp ground, where a trough could be filled and heated stones used to bring the water rapidly to temperature.