Somewhere between Celbridge and Leixlip, during the unglamorous business of topsoil-stripping for a road interchange, a spread of fire-cracked stone quietly announced itself. The site, measuring roughly 13 metres by 20 metres, was identified as a possible fulacht fia, one of the most numerous and least understood monument types in the Irish archaeological record. A fulacht fia is, in essence, a prehistoric cooking place, typically consisting of a trough or pit into which water was poured and heated by dropping fire-heated stones into it; the shattered, burnt stones were then raked out and piled nearby, forming the characteristic mound. Here, that mound measured 17 metres by 8 metres, with a small pit identified to the south-west.

The discovery came as part of a broader monitoring exercise carried out between April and December 2001, during construction of the Celbridge Interchange. Over a corridor of approximately four kilometres through gently undulating land, a mixture of arable fields, pasture, and woodland, eighteen potential archaeological sites were recorded in total. This particular site, designated Site 10, sat within a landscape that carries its own historical layering. The southern portion of the road scheme passed through an area shaped by 18th-century estate design, with formal avenues, planted woodland, and tree-lined field boundaries belonging to the demesne of Castletown, an early 18th-century house that once set the visual and social tone for the surrounding countryside. The fulacht fia, by contrast, predates all of that by several thousand years, its origins likely reaching back to the Bronze Age, when this same ground would have looked very different indeed.