That combination is what makes this particular site stand out.

A fulacht fia is a type of ancient cooking place found in great numbers across Ireland, typically consisting of a mound of fire-cracked stone accumulated beside a water trough, where stones were heated and dropped into water to bring it to the boil. The Groin example, excavated following its discovery during development monitoring, contained two troughs set within a burnt spread measuring roughly nine metres by four metres. Trough 1, nearly circular and sunk to a depth of 0.65 metres, had been recut at some stage and shows clear evidence of use in metal smelting, an unusual secondary function for a site of this type. Trough 2 was slightly shallower and subcircular in plan, and both troughs were associated with pot-boilers, the heat-shattered stones that are the diagnostic signature of fulacht fia activity. One trough retained traces of wood lining, which would have held water without it seeping into the surrounding ground. A second fulacht fia lies approximately fifty metres to the north-west, suggesting that this small area of Kerry was used repeatedly and across time, though whether the two sites were contemporary with one another is not recorded.