Somewhere beneath a south-facing pasture slope in Sillaheens, County Waterford, lies a feature that only came to light because someone was digging up land. A scatter of broken and burnt stones, glimpsed during reclamation work and then swallowed again by the soil, is all that marks what archaeologists classify as a burnt mound, one of the most numerous yet least understood monument types in Ireland.

Burnt mounds are exactly what the name suggests: accumulations of fire-cracked stone, typically found near water sources and thought to date from the Bronze Age, though examples span a wide period. The prevailing theory is that they represent cooking sites, where stones were heated in a fire and then dropped into a water-filled trough to bring it to the boil, a method sometimes called fulacht fiadh in Irish tradition. Others may have served as saunas, craft workshops, or communal gathering places. At Sillaheens, no excavation record accompanies the local memory of those broken, scorched stones, so the specifics of this particular deposit remain unknown. What is clear is that the mound is no longer visible at ground level, having been absorbed back into the working landscape of a field that has no reason to announce what lies beneath it.