The spread measures roughly 26 metres by 22 metres, a modest but meaningful footprint in the turf, sitting to the south-west of what is now a dried-up pond.

A fulacht fia, sometimes called a burnt mound, is one of the most common prehistoric monument types in Ireland. The basic idea is straightforward: stones were heated in a fire, dropped into a water-filled trough to bring it rapidly to the boil, and used for cooking, possibly also for bathing or industrial processes such as working leather. The cracked, heat-shattered stones were then raked out and discarded, building up over repeated use into the low horseshoe-shaped mounds that survive today. What makes the Kilgilky example particularly interesting is that it is not isolated. It belongs to a cluster of three such monuments in close proximity, suggesting this corner of north Cork was a place of repeated, organised activity across what may have been a considerable span of Bronze Age time. The presence of a pond nearby, now dried up, fits the pattern well; a reliable water source was essential to the whole process, and fulachta fiadh are almost always found close to streams, springs, or boggy ground.