In a rough pasture on the slopes of the upper Tay river valley in County Waterford, a low horseshoe-shaped mound sits quietly beside a stream, its heather and grass cover making it easy to overlook. It measures eighteen metres along its longer axis and rises to around one and a half metres at its highest point, which is modest enough to pass for a natural feature. What gives it away is the trough, a hollow four metres by three metres cut into the northeastern end, and the burnt stones packed throughout the mound. This is a fulacht fia, a type of prehistoric cooking or processing site found in large numbers across Ireland, typically Bronze Age in date, and almost always positioned close to a water source.

The basic principle of a fulacht fia is straightforward. Stones were heated in a fire and then dropped into a water-filled trough, bringing the water to a boil quickly and efficiently. Over repeated use, the stones cracked and became useless, and were piled up around the trough, forming the characteristic horseshoe mound that survives today. The stream immediately to the north of this example would have supplied the necessary water. The site also sits within or alongside an associated field system, suggesting it was not an isolated feature in the landscape but part of a broader pattern of human activity in the valley. Whether that connection was contemporary or represents overlapping episodes of land use across different periods is the kind of question that only excavation could properly answer.