That, in itself, is the point. Until around 1980, a large mound of burnt and shattered stone occupied this spot, the characteristic signature of a fulacht fia, and then it was levelled. No visible surface trace remains.

A fulacht fia is a type of prehistoric cooking or processing site, typically consisting of a horseshoe-shaped mound of fire-cracked stone built up over centuries of repeated use beside a trough of water. The method involved heating stones in a fire and dropping them into the water-filled trough to bring it to a boil. The broken, heat-shattered stones were then raked aside, gradually accumulating into the mound that archaeologists now recognise as one of the most common prehistoric monument types in Ireland. The Ballynatona example was described as a large mound with a stone revetment, a facing of upright or laid stones used to retain and stabilise the mound material, with its opening oriented to the south-east. That orientation may have been practical, keeping the working area sheltered, or it may reflect something else entirely; nobody recorded it closely enough before the levelling took place around 1980.

What makes this site worth noting is precisely its erasure. The mound was removed within living memory, almost certainly during agricultural improvement work, and the record of what stood here now depends entirely on local recollection rather than any physical evidence. It is a reminder that the archaeological landscape is not fixed, and that a great many sites documented in county inventories exist now only as descriptions, coordinates, and the memories of people who happened to mention them before the ground was cleared.