Beneath the turf lies a spread of burnt and shattered stone, the characteristic signature of a fulacht fia, the remains of a prehistoric cooking site found in great numbers across Ireland. The name refers to a type of monument typically consisting of a trough, often timber-lined or dug into clay, and a surrounding mound of fire-cracked stone, built up over repeated use as rocks were heated in a fire and dropped into water-filled troughs to bring them to the boil. They date broadly to the Bronze Age, though some examples span a wider period, and they are among the most commonly recorded prehistoric monuments in the country.

What makes the Farrangeel site quietly interesting is not its isolation but its company. A second fulacht fia lies roughly seventy metres to the west-northwest, a pairing that suggests repeated or sustained activity in this landscape over time. Whether the two monuments were used simultaneously, or represent separate episodes of occupation across generations, is not recorded, but their proximity hints at a locale that held some practical or habitual significance to the people who worked it. The grass-covered spread visible today is the accumulated debris of that ancient activity, stone after stone discarded once it had fractured beyond further use.