But the circular earthwork at Ballyshurdane is a rath, an early medieval farmstead enclosure of the kind that once dotted the Irish countryside in their tens of thousands, and this one has quietly survived on a south-east-facing pasture slope in north Cork with most of its geometry still legible.

The enclosure measures roughly 19 metres north to south and 18 metres east to west, making it a fairly modest example of the type. A rath, to put it plainly, is a ringfort defined by earthen rather than stone construction, typically thrown up around a single farming household between roughly the fifth and twelfth centuries. Here the enclosing bank runs from the south-west around to the north, where it transitions into a stone wall continuing north-eastward, with only faint traces surviving elsewhere on the circuit. The bank itself is not dramatic in scale, rising about 0.7 metres on the interior face and a little over a metre on the exterior, but that modest height is enough to mark a clear boundary between what was once a protected domestic space and the farmland beyond it. The interior slopes gently downward toward the south-east and remains clear of the overgrowth that has colonised the bank itself, where trees, bushes and briars have established themselves over what was once open earthwork.