It measures 14.4 metres north to south and consists almost entirely of burnt and fire-cracked stone, the accumulated debris of prehistoric cooking. This is a fulacht fia, a type of Bronze Age cooking site found in enormous numbers across Ireland, typically beside water. The method involved heating stones in a fire and dropping them into a water-filled trough until the water boiled, then using that heat to cook meat. The broken, heat-shattered stones were raked out and piled up, and over time those discards built into the low, horseshoe-shaped mounds that survive in fields and bogs to this day.

What makes the site at Knockahorrea quietly interesting is its setting and its company. It sits on a slope overlooking a stream valley, which is exactly where you would expect such a site to be, given the reliance on a reliable water source. More significantly, it is not alone. Two further fulachta fiadh lie nearby, forming a cluster of three, which raises questions that archaeology cannot yet answer with certainty. Were they in use at the same time, representing a community returning repeatedly to a favoured spot? Or do they represent separate episodes of activity across centuries, each generation inheriting a landscape already dotted with the leavings of earlier ones? The mound itself is now barely perceptible, its profile softened by centuries of grazing and weathering, but it is there.