At the western foot of a moderately steep slope in Boleybeg, County Kildare, there is nothing left to see. That absence is itself the point. Beneath what is now improved pasture, there once stood a fulacht fia, a type of prehistoric cooking or processing site typically consisting of a horseshoe-shaped mound of fire-cracked stones built up beside a water trough. They are among the most common ancient monument types in Ireland, yet individually they are quietly fragile, and the one at Boleybeg did not survive the agricultural improvements of the twentieth century.

By 1972, this fulacht fia had been described as recently destroyed, its ground cleared of ditches and re-fenced as part of a wider programme of land improvement. A second fulacht fia, located approximately 65 metres to the west-northwest, was lost at the same time. The two monuments had apparently sat close together at the base of the slope, and both were erased in the same episode of clearance. No visible surface trace of either survives today. The pairing is itself of some interest; clusters of fulachtaí fia are not unusual, and their proximity sometimes suggests repeated or communal use of a favoured spot near a reliable water source, though the specific circumstances here can only be guessed at.