This is a fulacht fia, a type of Bronze Age cooking site found in their hundreds across Ireland, typically sited near water. The mound at Lackendarragh measures roughly nine and a half metres east to west and just over eleven metres north to south, rising to about a metre in height, with a two-metre opening facing north-east. It is the accumulated debris of repeated use, the shattered stone discarded after cycles of heating and quenching in a water trough.

What makes the Lackendarragh site quietly notable is the proximity of a second fulacht fia, recorded just two metres to the north-east. The pairing is not unheard of, but it raises questions that archaeology has not fully settled: whether such sites were used simultaneously, sequentially, or by different groups across a span of generations. The classic interpretation of fulachtaí fia, which is the plural form, centres on cooking, with heated stones used to bring water to the boil in a timber- or stone-lined trough sunk into the ground. More recent thinking has widened the possibilities to include hide-working, bathing, or brewing, and the presence of two such monuments in immediate proximity only adds to the interpretive interest. The stream sixty metres to the east would have supplied the water essential to whichever of these activities took place here.