To the untrained eye it might look like nothing more than a scorched anomaly in the earth, but this kind of spread is the characteristic signature of a fulacht fia, one of the most common and most puzzling monument types in the Irish archaeological landscape.

Fulachtaí fia are found in their thousands across Ireland, dating predominantly to the Bronze Age, roughly 1500 to 500 BC, though some examples fall outside that range. The typical form involves a trough, often timber-lined or cut into the subsoil, into which water was channelled or allowed to collect. Stones were heated in a nearby fire, then dropped into the water to bring it to a boil. The stones shatter with repeated heating and cooling, and the resulting mounds of cracked, fire-reddened material, sometimes called burnt mounds, are what survive in the ground long after every other trace of activity has disappeared. What exactly these sites were used for remains genuinely contested: cooking has long been the standard explanation, but proposals ranging from textile processing to bathing to brewing have all attracted serious scholarly attention. The Ightermurragh example, visible as a surface spread rather than a standing mound, suggests that ploughing over the centuries has gradually flattened whatever was once a more pronounced feature.