At Boleybeg in County Kildare, there is a site that no longer exists in any visible form, yet remains recorded, catalogued, and quietly mourned in the archaeological record. What once stood at the western foot of a moderately steep slope was a fulacht fia, one of the low horseshoe-shaped mounds found across the Irish countryside that are associated with Bronze Age cooking or industrial activity. The typical fulacht fia consists of a trough, often timber-lined, into which water was poured and heated by dropping fire-cracked stones into it. Over generations of use, the shattered, heat-fractured stones accumulated into a mound around the trough. Thousands of these monuments survive across Ireland. This one does not.

By 1972, this fulacht fia had been recently destroyed, along with a second example of the same monument type located roughly 65 metres to the east-south-east. The destruction came as part of agricultural improvement works, a process that was particularly intensive in mid-twentieth-century Ireland as land was being rationalised, drained, and re-fenced to suit modern farming practices. In this case, a wide area of adjoining land was cleared of ditches and re-enclosed, and both monuments were lost in the process. No visible surface trace survives at either location today, leaving nothing to indicate that Bronze Age activity once took place across this stretch of improved pasture.