These are ancient cooking sites, typically dating to the Bronze Age, consisting of a horseshoe-shaped mound of burnt and fire-cracked stone alongside a trough, usually timber-lined, that would once have been filled with water. Stones were heated in a fire and then dropped into the trough to bring the water to a boil, a remarkably efficient method that experimental archaeology has repeatedly confirmed. The example at Knopoge, in County Clare, is one of countless such monuments that survive quietly in fields and boggy ground across the country, most of them unremarked by passing traffic.

The sheer density of fulachtaí fia across Ireland, Clare included, speaks to a period of considerable activity in the second millennium BC, when communities were working, moving, and gathering across landscapes that would be largely unrecognisable today. The burnt mounds that survive are essentially the accumulated debris of repeated use, the discarded cracked stones building up over time into the low, rounded forms that farmers and walkers occasionally notice without quite knowing what they are looking at. Whether Knopoge's example sits in bog, pasture, or scrub, and what condition it presently survives in, remain details not currently available in the public record.