It looks like nothing more than a slight rise in waterlogged ground, heavily overgrown and easy to dismiss. In fact, it is the remnant of a fulacht fia, a type of prehistoric cooking site found in considerable numbers across Ireland, particularly in low-lying, wet ground near water sources. The typical arrangement involved a trough, often timber-lined or stone-lined, filled with water and heated by dropping fire-cracked stones into it. Those stones, fractured and spent after repeated heating and quenching, were piled to one side, and it is exactly that accumulated debris which forms the horseshoe-shaped or oval mounds that survive today.

Fulachtaí fia are generally dated to the Bronze Age, roughly 1500 to 500 BC, though some examples have produced earlier or later dates. The burnt mound at Ballycurrany follows the pattern well: boggy ground, proximity to a stream, and a heap of heat-shattered material that has been quietly accumulating moss and scrub for the better part of three millennia. The precise function of these sites has been debated by archaeologists for decades. Communal cooking is the most widely accepted explanation, but brewing, textile processing, and bathing have all been proposed, and the evidence at different sites points in different directions. What is consistent is the method: fire, stone, and water, repeated until the stone could take no more.