There is nothing to see at the surface, no mound, no depression, no marker. The site came to light only when drainage works cut through the ground and exposed what lay underneath.

What the drainage workers encountered was almost certainly the remains of a fulacht fia, a type of prehistoric cooking site found in considerable numbers across Ireland. The term refers to a trough, typically timber-lined or cut into the ground, into which water was poured and then heated by dropping fire-cracked stones from a nearby hearth. The burnt and shattered stones would accumulate into a mound beside the trough, and it is these distinctive spreads of fractured, fire-reddened stone that archaeologists recognise as the signature of the site type. Most fulachtaí fia date to the Bronze Age, roughly 1500 to 500 BC, though examples from other periods are known. The Kilnaglory site fits the pattern closely: the pit filled with burnt material is exactly the kind of deposit that repeated episodes of stone-boiling would produce over time. Beyond what local people reported during the drainage works, the specifics of the site remain largely unknown.