Far less celebrated is the fact that the same townland also contains a fulacht fia, a type of site so common across the Irish landscape that individual examples rarely attract much attention, yet whose purpose and social context remain genuinely contested among archaeologists.

Fulachtaí fia, found in their thousands across Ireland, are among the most frequently recorded prehistoric monument types in the country. They typically appear as horseshoe-shaped or kidney-shaped mounds of fire-cracked stone, usually beside a water source, and date predominantly from the Bronze Age, roughly 1500 to 500 BC. The working theory for most of the twentieth century held that they were outdoor cooking sites, where water in a timber-lined trough was heated by dropping fire-heated stones into it until it boiled. More recent experimental and interpretive work has raised the possibility that some may have served as communal bathing or brewing sites, or held some ritual significance, though cooking remains the most widely accepted primary function. The presence of one at Gleninsheen places this corner of the Burren within a pattern of Bronze Age settlement and activity that the dramatic geology of the region can sometimes obscure, suggesting ordinary domestic or communal life going on alongside whatever ceremonial or prestige activities produced objects like the famous gold collar found nearby.