A fulacht fia is a Bronze Age cooking site, typically consisting of a horseshoe-shaped mound of fire-cracked stone surrounding a trough, where water was heated by dropping in stones that had been made red-hot in a nearby fire. Thousands of them survive across Ireland, mostly as low, damp mounds in boggy ground, but the one at Barrahaurin is now barely a trace.

The site was levelled around 1938, when drainage works in the area flattened the mound. What remains is a spread of the burnt material that once formed the core of the monument, the cracked and blackened stones that accumulate over repeated use and are eventually discarded into the surrounding heap. The date 1938 is a small but telling detail; the mid-twentieth century saw enormous amounts of land drainage and agricultural improvement across Ireland, and many low-lying earthworks vanished quietly during this period, neither excavated nor recorded in any depth before they were gone.