Running from south-east to north-west across an east-facing slope, what looks like an ordinary earthen fence bank is in fact a surviving fragment of a rath, the Irish term for an earthen ringfort. These circular enclosures, typically built during the early medieval period, served as enclosed farmsteads for a single family or small community, their raised banks offering a degree of protection for livestock and a clear demarcation of territory. Most have either vanished entirely into the soil or been absorbed, as here, into the working landscape around them.

The clearest evidence for what once stood at Shanahee comes from the Ordnance Survey six-inch map of 1842, where the site is recorded as a complete circular enclosure. That survey, carried out in the first half of the nineteenth century, captured thousands of such features across Ireland at a moment before agricultural intensification erased many of them for good. By the time the site came to be described in the Archaeological Inventory of County Cork, the circle was no longer intact, but the remnant bank persisting in the field fence system confirmed that something deliberate and ancient underlies the modern boundary line.