These horseshoe-shaped mounds, typically found beside streams or marshy ground, are the remnants of ancient cooking sites, possibly dating as far back as the Bronze Age. The usual interpretation holds that stones were heated in a fire and then dropped into a water-filled trough, bringing the water to a boil and allowing meat to be cooked. The mounds themselves are the accumulated debris of that process, cracked and fire-shattered stone discarded over repeated use. That such a modest piece of domestic or communal technology could survive in the ground for three thousand years or more is, in its quiet way, rather remarkable.

The example recorded near Cashel in County Mayo sits within a landscape that has long retained traces of early settlement. Mayo's western terrain, with its boggy ground and reliable water sources, offered precisely the conditions that fulachtaí fia seem to favour. The preservation of these sites is often owed to the very bogs that make the land difficult to farm, sealing organic material and stone alike beneath layers of peat. Beyond its classification and location, the specific details of this particular site remain sparse, and little can be said with confidence about its dimensions, condition, or immediate surroundings without further investigation.