A fulacht fia is a type of prehistoric cooking site, typically consisting of a trough used for boiling water by dropping fire-heated stones into it, leaving behind a horseshoe-shaped mound of cracked and burnt stone. Thousands of these sites survive across Ireland, most dating from the Bronze Age, and they tend to cluster near water. The Killarney example fits that pattern well enough, though with an added layer of ambiguity.

The golf course was built in 1969, and somewhere to the north-east of that fifth fairway lies an area of marshy, reed-covered ground that may overlie the remains of a fulacht fia. The qualification matters: the site is classified as a possible example, and nothing of it is visible at ground level. The reeds and boggy terrain are the only outward sign that something might be there. Whether the course's designers were aware of the potential archaeological significance when they named the fairway is unclear, but the name suggests at least some local awareness of what the ground might hold.