The one at Ballymacloon in County Clare is a quiet example of a type that appears in almost every county, often noticed only as a low, horseshoe-shaped mound of fire-cracked stone sitting in damp ground near a stream or spring. The name translates roughly as "cooking place of the deer," and while the exact purpose of these sites has been debated for decades, the most widely accepted explanation is that they served as Bronze Age cooking facilities, where stones were heated in a fire and then dropped into a water-filled trough to bring it to a boil. The burnt and shattered stones, discarded after repeated heating and cooling, are what form the characteristic mound.

Fulachtaí fia date broadly to the Bronze Age, roughly 1500 to 500 BC, though some examples have yielded earlier or later dates. They tend to cluster in low-lying, waterlogged areas, which is thought to reflect both the practical need for a reliable water source and the possibility that marginal wetland was not otherwise under cultivation or settlement pressure. Some researchers have proposed additional uses beyond cooking, including textile processing, leather working, or even bathing, and experimental archaeology has shown that the trough-and-hot-stone method is a surprisingly efficient way to heat large volumes of water. The Ballymacloon site sits within this broad tradition, one node in a network of prehistoric activity that shaped the Clare landscape long before the arrival of ringforts or round towers.