The one at Moyne in County Clare is a quiet example of a type that has puzzled researchers for generations. A fulacht fia typically survives as a low, horseshoe-shaped mound of fire-cracked stone, usually found close to a water source. The leading interpretation is that these were Bronze Age cooking sites, where stones were heated in a fire and then dropped into a water-filled trough to bring it to a boil, the cracked and discarded stones accumulating into the mound over repeated use. Other theories have proposed that they served as bathing facilities, brewing vats, or textile-working sites, and the honest answer is that the evidence does not firmly rule any of these out.

The Bronze Age in Ireland ran roughly from 2500 to 500 BC, and most fulachtaí fia are thought to date to somewhere within that broad span, making the Moyne example part of a landscape that was being actively managed and used by farming communities long before the arrival of Christianity or the first written records. Clare has a considerable concentration of these monuments, and the townland of Moyne sits within a county whose boggy ground and numerous streams provided exactly the kind of waterlogged setting in which fulachtaí fia tend to cluster and, crucially, survive. The waterlogged conditions that make such land awkward for later development are also what preserve the charcoal, burnt stone, and organic material that archaeologists depend on for dating and analysis.