These horseshoe-shaped mounds, found in their thousands across Ireland, are the remains of ancient cooking or heating sites, typically Bronze Age in date, where stones were heated in a fire and then dropped into a water-filled trough to bring it to the boil. The characteristic burnt and shattered stone, blackened by repeated heating and cooling, accumulates over time into the crescent mounds that survive today, often in low-lying, marshy ground where water was readily available.

Fulachtaí fia, as a class of monument, have been debated by archaeologists for generations. The cooking explanation, supported by experimental archaeology, remains the most widely accepted, though theories about their use for brewing, textile processing, or communal bathing have also been proposed. What makes each individual site worth noting is precisely its ordinariness within the broader pattern: these were working features of the prehistoric landscape, used repeatedly over time, and the townland of Leana would have been no different from hundreds of comparable locations across Munster and beyond. Clare itself has a dense distribution of such sites, particularly in areas with poorly drained soils where the Bronze Age population left behind evidence of this sustained, practical relationship with water, fire, and stone.