A fulacht fia is a type of ancient outdoor cooking site, typically identified by a horseshoe-shaped mound of fire-cracked stones and charcoal built up over centuries of use. The method involved heating stones in a fire and dropping them into a water-filled trough to bring it to a boil, a surprisingly efficient technique used across Ireland during the Bronze Age. What remains at Reagrellagh is a spread of this characteristic burnt material, the residue of that process, though the mound itself is gone.

According to local information, the mound was levelled around 1978, the kind of quiet, undocumented loss that happened across Irish farmland when machinery became widely available and ancient earthworks were simply removed as obstacles. What had probably endured for three thousand years or more was gone within an afternoon. The scatter of burnt stone left behind in the soil is now the only visible indicator that something significant once occupied this corner of a Cork field.