A spread of heat-shattered stones and charcoal-darkened soil roughly 22 metres north to south and 20 metres east to west sits quietly in the tilth of a gently sloping hillside, its exact outline unreadable because the growing season got in the way when surveyors came to look.

What lies here is known as a burnt mound, or fulacht fiadh in Irish tradition. These are among the most commonly recorded prehistoric monument types in Ireland, typically consisting of a mound of fire-cracked stones discarded beside a trough or pit in which water was heated by dropping in stones from a fire. What they were actually used for, whether cooking, bathing, textile processing, or something else entirely, has been debated by archaeologists for decades without firm resolution. The stones shatter from repeated thermal shock, and the resulting scatter, mixed with charcoal from the fires, is often all that survives above ground after several thousand years. At Ballybranagh, the gentle NNW-facing slope and the tillage context mean the feature has been considerably levelled over time, leaving a diffuse smear of material rather than a pronounced mound. About 160 metres to the north-northeast, a levelled enclosure has also been recorded, suggesting this part of Cork was worked, occupied, or marked in some purposeful way during the prehistoric period, though the relationship between the two features remains unclear.