It measures roughly 7.6 metres along its longer axis and stands only 0.6 metres high, its top flat except for a slight central depression. What makes it worth a second look is its shape: a horseshoe, open to the north-west, with a spread of burnt material inside. This is a fulacht fia, one of the most common yet most quietly puzzling monument types in the Irish landscape.

A fulacht fia is a prehistoric cooking site, typically Bronze Age in date, consisting of a trough dug into the ground, a hearth for heating stones, and a mound formed from the accumulated debris of shattered, fire-cracked rock. The method was straightforward: stones were heated in a fire, then dropped into a water-filled trough to bring it to a boil, and the spent, broken stones were thrown aside. Over generations of repeated use, those discarded fragments built up into the characteristic horseshoe mound surrounding the trough opening. The boggy, rush-covered ground around this particular example is entirely typical; fulachtaí fia cluster near water sources, and their presence in marshy or low-lying areas is one of the features that makes them recognisable in the landscape even before closer inspection. A second possible example of the same monument type lies roughly 230 metres to the south-east, which is also unsurprising: these sites often occur in loose groupings, suggesting that certain stretches of land were returned to repeatedly, perhaps seasonally, over long periods.