It is an unassuming patch of ground, easy to dismiss as scorched earth or farm debris, yet it marks the remnant of a fulacht fia, one of the most common yet least understood monument types in the Irish landscape.

A fulacht fia, sometimes called a burnt mound, is essentially a Bronze Age outdoor cooking or industrial site. The typical arrangement involved a timber-lined trough filled with water, heated by dropping stones that had been fired in a nearby hearth. The stones would shatter and discolour with repeated heating and quenching, and over time the broken, blackened fragments accumulated into a mound beside the trough. These sites are found in their thousands across Ireland, often in low-lying or waterlogged ground, and their exact purposes remain debated, with cooking, brewing, textile processing, and bathing all proposed by researchers. The Walterstown example, recorded in the Cork archaeological inventory, survives as a surface spread rather than a standing mound, its shape and extent revealed primarily through ploughing, which has flattened and dispersed the original deposit across a considerable area of the field.