It is a fulacht fia, a type of prehistoric cooking site found in enormous numbers across Ireland, and what makes this particular one quietly interesting is its proximity to another of its kind, just a hundred metres or so to the north-west. Two of these ancient cooking monuments within easy sight of each other raises questions that are easier to ask than to answer.

A fulacht fia, sometimes called a burnt mound, is essentially the accumulated debris of repeated open-air cooking. The typical method involved heating stones in a fire, dropping them into a water-filled trough to bring it to the boil, and using that heat to cook meat. The shattered, fire-cracked stones were then discarded to one side, building up over time into the characteristic low mound that survives today. Thousands of these sites are known in Ireland, most dating to the Bronze Age, roughly 2000 to 500 BC, though some are later. They cluster near water, and their precise social function, whether communal feasting, industrial processing, or something else entirely, remains a matter of ongoing discussion among archaeologists. The Glenleigh example is recorded simply as a grass-covered spread of burnt material in pasture, the mound shape perhaps worn down by centuries of agricultural use, but the blackened, fire-worked stone beneath the sod is the same material found at sites excavated across the country.