The one at Ballysallagh in County Cork requires rather more patience. What survives here is almost entirely below the threshold of casual notice: low undulations in the pasture grass, shallow depressions that could easily be mistaken for the ordinary unevenness of a grazed field on a slope. Only when you know what you are looking at do the contours begin to make sense.

A ringfort, or rath, was typically a circular enclosure defined by one or more earthen banks and ditches, used as a farmstead or defended homestead during the early medieval period in Ireland, roughly between the fifth and twelfth centuries. The Ballysallagh example was a multi-vallate example, meaning it had more than one concentric ring of banks and ditches, a feature sometimes associated with higher-status settlements. Its diameter was approximately 55 metres. By the time the Ordnance Survey recorded it on their six-inch map of 1842, the enclosure was already reduced enough that it required cartographic rather than physical recognition. What the ground now shows are faint ridges running from the ESE to the NNE and from the WSW to the NNW, with corresponding external depressions marking where the inner and outer banks and their accompanying fosses, the ditches dug to form the banks, once defined the boundary of someone's world. Beyond these traces, nothing remains on the surface.

The site sits on north and east-facing slopes in land that has remained in agricultural use, which goes some way to explaining its gradual erasure. Centuries of ploughing, grazing, and field management have worn the earthworks down until they exist less as a monument than as a faint memory encoded in the topography. For anyone inclined to look, the gentle asymmetries of the ground on a low-angled morning light are the closest thing to a legible record left at Ballysallagh.