This is a fulacht fia, one of the most common prehistoric monument types found across Ireland, and yet also one of the least understood. The name, roughly translated as "cooking place of the deer," refers to a class of site typically dated to the Bronze Age, characterised by a horseshoe-shaped mound of fire-cracked stone surrounding a depression that once held a trough. The accepted explanation, supported by successful modern experiments, is that stones were heated in a fire and dropped into a water-filled trough to bring it rapidly to the boil, making the site a kind of outdoor cooking facility. Other theories have proposed uses ranging from textile processing to brewing, and debate continues among archaeologists.

Fulachtaí fia are found in their thousands across Ireland, often clustered near streams or boggy ground where water would have been readily available. Their Bronze Age dating, generally spanning from around 2000 to 500 BC, places them in a period of considerable activity in the Irish landscape, when communities were farming, trading, and leaving behind a variety of earthworks and field systems. The Cashel area of Mayo, like much of the west of Ireland, contains a concentration of such prehistoric remains, preserved in part by the bogland that has insulated them from later agricultural disturbance. The burnt stone mounds are often low and unassuming, easily mistaken for natural features, which goes some way to explaining why so many were overlooked for so long.