They appear as low, horseshoe-shaped mounds, typically found near water, and are thought to date from the Bronze Age, roughly 1500 to 500 BC. The prevailing theory holds that they were outdoor cooking sites: a trough dug into the ground and lined with wood or stone would be filled with water, and fire-heated rocks dropped in to bring it to the boil. The burnt and shattered stones, discarded after repeated heating, gradually built up into the characteristic mound shape. At Molougha in County Clare, one such monument survives, a quiet remnant of a practice that was repeated at thousands of locations across the island over the course of many centuries.

The broader Clare landscape holds a considerable concentration of prehistoric activity, and fulachtaí fia in the region follow the familiar pattern of low-lying, often waterlogged ground close to streams or springs. The choice of location was practical: a reliable water source was essential to the whole process. Whether these sites were purely domestic, used for communal feasting, or served some other purpose entirely remains a matter of ongoing archaeological debate. Some researchers have proposed uses ranging from textile processing to brewing, though cooking remains the most widely accepted explanation. The Molougha example sits within this unresolved but genuinely fascinating question about how Bronze Age communities organised their daily or ritual lives.