It is, in fact, the remains of a fulacht fia, a type of prehistoric cooking site found in large numbers across Ireland, particularly in low-lying, well-watered land. The typical interpretation is that these sites were used for boiling water, by heating stones in a fire and dropping them into a trough, with the shattered and fire-cracked stones gradually accumulating into the distinctive curved mound that survives today. The horseshoe shape is characteristic of the type, the gap in the mound marking where the trough once sat.

The Furhane example measures roughly 23 metres on each axis and rises only half a metre above the surrounding pasture, modest dimensions that nonetheless represent a significant volume of discarded burnt stone. There is a 4-metre gap to the north-north-east. It sits in good pastoral land, which fits the broader pattern: fulachtaí fia tend to cluster in areas close to water and suitable for seasonal activity, and they are generally dated to the Bronze Age, though some sites show evidence of use across long periods. This particular site was documented as part of the North Kerry Archaeological Survey, published in 1995, which catalogued a wide range of monuments across the region.