The one at Levallinree in County Mayo is a quiet example of a site type that has puzzled archaeologists for generations. A fulacht fia typically survives as a low, horseshoe-shaped mound of fire-cracked stone and charcoal-rich soil, usually situated close to a water source. The mound is the debris of repeated heating: stones were brought to temperature in a fire, then dropped into a water-filled trough to bring it to the boil. What the troughs were actually used for is still debated, with cooking, brewing, textile processing, and bathing all proposed at various points.

These sites are almost exclusively dated to the Bronze Age, broadly between 1800 and 800 BC, though some examples have produced dates outside that range. Their concentration in low-lying, marshy ground, often on the fringes of bog, is one of their most consistent features, and Mayo, with its extensive wetlands and drumlin topography, has a considerable number of recorded examples. Levallinree sits within that broader pattern, a townland in the west of Ireland where the underlying landscape has preserved evidence of activity that is, by any measure, extraordinarily old.