It is roughly nine metres across and barely 0.6 metres high, the kind of rise that might be dismissed as a natural hummock were it not for what it represents. This is a fulacht fia, a type of prehistoric cooking site found in great numbers across Ireland, typically beside water and in low-lying, often boggy ground. The name, loosely translated from the Irish, is associated with wild deer or outdoor cooking, and the mounds themselves are the accumulated debris of a process repeated over centuries: stones heated in fire, dropped into a water-filled trough to bring it to a boil, then discarded when they cracked from the thermal shock. Over time, those shattered, fire-reddened stones piled up into the rounded humps that survive today.

Fulachtaí fia are among the most common archaeological monuments in Ireland, with thousands recorded nationwide, most dating to the Bronze Age, roughly 2000 to 500 BC, though some examples span into the early medieval period. Their consistent placement beside streams and in wetlands was deliberate; a reliable water source was essential to the whole operation. The Clogheen example fits the pattern precisely, positioned to the south of a large stream and set within marshy terrain. Its modest height reflects the typical profile of these sites, where centuries of weathering and the soft ground beneath have gently flattened what was once a more pronounced heap of spent stone. The site was recorded by Walsh in 1985 and later included in the published archaeological inventory of east and south Cork.