They appear as low, horseshoe-shaped mounds, typically found near water, and are thought to date mainly from the Bronze Age, somewhere between 1500 and 500 BC. The prevailing theory is that they functioned as cooking sites: a trough dug into the ground and lined with wood or stone would be filled with water, then heated by dropping fire-cracked rocks into it until the water boiled. Those cracked and shattered stones, discarded in heaps around the trough, are what form the mounds visible today. Kerry has a particularly dense concentration of these sites, and the one recorded at Baile Uí Uaithnín is a quiet addition to that broader pattern.

The place name Baile Uí Uaithnín is an Irish townland name suggesting a settlement historically associated with a family or sept of that name, though the fulacht fia itself long predates any such association, belonging instead to a period when the landscape was being worked and occupied in ways we can only partially reconstruct. The monument sits within a county that has yielded enormous amounts of Bronze Age material, from standing stones to wedge tombs, and fulachtaí fia are often found clustered near wetlands or stream edges, precisely the kind of terrain that Kerry's topography provides in abundance. Whether the site here was used for cooking, hide-tanning, textile production, or some combination of purposes remains an open question, one that applies to fulachtaí fia generally and has kept archaeologists debating for decades.