The one at Ballygown, in North Cork, sits in rough grazing ground to the south-east of a stream, presenting itself as a low, kidney-shaped mound of burnt and heat-shattered stone. It measures roughly 25 metres east to west and 21 metres north to south, rising to about 1.1 metres at its highest point, with a wide opening of 6.5 metres facing north. The mound is overgrown, as these monuments tend to be, which is partly why so many survive at all.

A fulacht fia, in its simplest form, is a cooking site. The typical arrangement involved a trough filled with water, heated by dropping fire-cracked stones into it until the water boiled. Those stones, once spent, were discarded to the side, and it is the accumulated heap of this dark, crumbly burnt material that forms the characteristic mound visible today. The practice dates broadly to the Bronze Age, though some examples are earlier or later, and the precise function of individual sites remains a subject of debate among archaeologists, with proposals ranging from cooking and food processing to bathing or hide preparation. What makes the Ballygown site particularly notable in its local context is that it does not stand alone. It forms part of a cluster of three such monuments in the same area, a grouping that suggests repeated, perhaps seasonal use of this particular stretch of ground over a long period.