Somewhere in the townland of Friarstown in County Kildare, a small circular mound roughly twenty metres across was recorded on the 1939 edition of the Ordnance Survey six-inch map, sitting in a low-lying, poorly drained patch of ground. By 1987, when the site was visited and assessed, nothing remained visible at the surface. The mound had effectively vanished, leaving only the cartographic trace of something that had once been there.

The site is tentatively identified as a fulacht fia, a type of prehistoric cooking site found widely across Ireland, typically recognised as a horseshoe-shaped mound of burnt and shattered stone beside a trough or pit. The standard interpretation is that water in the trough was heated by dropping fire-heated stones into it, and the discarded, cracked stone accumulated over repeated use into the characteristic mound. They tend to cluster in wet or marshy ground, which fits the Friarstown location precisely. That said, the word "possibly" does real work here. Without excavation, the identification remains provisional, and the disappearance of any surface evidence by the late twentieth century means the question is unlikely to be resolved without more intrusive investigation.