This is a fulacht fia, a type of prehistoric cooking site found in enormous numbers across Ireland, typically dating from the Bronze Age. The principle was straightforward: stones were heated in a fire, dropped into a water-filled trough until the water boiled, and then used to cook meat. Over repeated use, the shattered, heat-spent stones were discarded into a characteristic horseshoe or oval mound beside the trough. Thousands of these sites survive across the Irish landscape, often in low-lying or waterlogged ground where a reliable water source was close at hand.

The mound at Carhoomeengar measures roughly five metres east to west and four metres north to south, rising just over half a metre above the surrounding bog surface. It is modest in scale but well preserved, and the stream beside it has done what streams often do to ancient earthworks: cut into the southern edge and exposed the burnt material within. What makes this particular spot quietly notable is that it does not stand alone. Another fulacht fia lies approximately twenty-five metres to the west, suggesting that this soggy corner of south-west Kerry saw repeated or sustained use over time, with more than one group returning to the same reliable stretch of running water. The level ground overlooking the bay would have made it a practical stopping point, the kind of place that accumulates use not because it is remarkable but because it works.