To a passing eye it might register as nothing more than a slight rise in the ground, but it is the remains of a fulacht fia, one of the most numerous and least understood monument types in the Irish archaeological record. These are prehistoric cooking sites, typically Bronze Age in date, where stones were heated in a fire and then dropped into a water-filled trough to bring it to the boil. Over time, the shattered, heat-spent stones were raked aside and accumulated into the characteristic horseshoe-shaped or oval mounds that survive across the Irish countryside in their thousands.

The site at Lyradane follows the classic pattern. The proximity to a stream would have been deliberate, providing a ready water source for the trough, and the mound itself is composed of the burnt and broken material discarded after repeated use. Whether cooking was the sole purpose of these sites has been debated by archaeologists for decades; proposals have ranged from textile processing to communal bathing, and it is likely that different sites served different functions at different times. What is less in doubt is the sheer labour involved in their repeated use, and the fact that so many survive at all speaks to just how common this activity once was across the Irish landscape.