A rath, as these early medieval farmstead enclosures are known in Irish, was originally a raised circular bank of earth, sometimes reinforced with timber or stone, enclosing a family's dwelling and outbuildings. The one at Sunfort in north County Cork survives, but only just, reduced to two low banks with a shallow fosse, or ditch, between them, the whole thing sitting so gently in the pasture that a casual walker could cross it without registering what they were standing on.

When the Ordnance Survey mapped this part of Cork in 1842, the site was recorded as a hachured circular enclosure roughly 35 metres in diameter, the standard cartographic shorthand for a raised earthwork. What the map captured has since been substantially levelled, and the surviving circular area now measures only about 21.8 metres across its east-northeast to west-southwest axis. The outer bank, which stands no more than 25 centimetres high, has been further cut into on its southern side by a field boundary, the kind of incremental agricultural attrition that has quietly erased thousands of similar monuments across Ireland. The site lies on a gentle south-facing slope about 150 metres north of the Awbeg River, a placement typical of raths, which were generally sited for drainage and outlook rather than dramatic elevation. The Awbeg runs through Spenser country, the landscape that Edmund Spenser wrote about in the late sixteenth century, though the ringfort itself belongs to a far older pattern of settlement, most likely the early medieval period between roughly the fifth and twelfth centuries.