This one, sitting in undulating pasture on a gentle north-north-east-facing slope at Lisballyhay in County Cork, is unassuming to the point of near-invisibility: an oval grass-covered rise, roughly fifteen metres by twelve metres and only about ten centimetres high, composed of heat-shattered stones and charcoal-enriched soil. That modest silhouette is precisely what makes it worth pausing over.

Burnt mounds, known in Irish archaeology as fulachtaí fia, are the accumulated debris of a cooking or heating process used primarily during the Bronze Age, roughly 1500 to 500 BC. The method was straightforward: stones were heated in a fire and then dropped into a water-filled trough, bringing it rapidly to the boil. The repeated thermal shock caused the stones to crack and splinter, and the discarded fragments built up over time into the distinctive mound that survives today. The charcoal-enriched soil found here is typical, the residue of the fires used to heat those stones over what may have been generations of use. A well sits immediately to the north-north-east of the mound, and its proximity is unlikely to be coincidental. A reliable water source was essential to the whole process, and the pairing of mound and water is one of the most consistent patterns observed at these sites across Ireland.