At Rowgarrane in County Cork, a circular enclosure roughly fifteen metres in diameter once occupied a south-east-facing pasture slope, and was still legible enough to be recorded on the Ordnance Survey's six-inch map of 1842. Today there is no visible surface trace; the land has been levelled, and the feature survives only as a cartographic memory and a coordinate in the archaeological record.

The enclosure belongs to a category of monument that is both common and poorly understood in the Irish landscape. Circular enclosures of this kind are often associated with early medieval settlement or agricultural organisation, though without excavation it is difficult to say more about function or date. What makes the Rowgarrane site quietly interesting is its relationship to its immediate surroundings. Two ringforts, the classic enclosed farmstead of early medieval Ireland, sit approximately 120 metres and 260 metres to the south respectively. Ringforts typically consist of a raised circular area defined by one or more earthen banks and ditches, and were the standard unit of rural settlement in Ireland from roughly the sixth to the twelfth centuries. The clustering of the Rowgarrane enclosure with these two ringforts hints at a small but organised pocket of early activity on this stretch of Cork hillside, even if the precise relationship between the three monuments is now impossible to determine.

There is nothing to see at the site itself, which sits in ordinary farmland. The interest lies less in visiting than in the act of looking at the 1842 Ordnance Survey map and finding the circle that no longer exists, a brief outline that outlasted the earthwork itself by the better part of two centuries.