The one at Brittas in north Cork asks more of the eye. Almost entirely levelled, it survives now as a faint circular depression and rise in rolling pasture, the kind of thing that registers as slightly odd before you can quite say why.

A ringfort, or rath, is a roughly circular enclosure defined by one or more earthen banks, built primarily during the early medieval period as a farmstead or high-status domestic site. At Brittas, the 1842 Ordnance Survey six-inch map still shows it as a clear hachured circle with a diameter of around fifty metres, which gives some sense of how much has been lost since. By 1934, when Bowman recorded it, the structure had already been reduced to a levelled single-ramparted fort of roughly twenty-nine yards across, on land belonging to a P. Mullane, with about one-sixth of the original rampart still visible within a field boundary. Today what remains on the ground is a circular area of approximately thirty-four metres east to west and thirty-two metres north to south, defined by a low rise just thirty-five centimetres high along the southern, western, and northern edges, and a scarp to the east, with the interior sloping gently downward in that direction. More interesting, perhaps, is a curve in the western field boundary that turns out to incorporate the remains of a second earthen bank, one-point-two metres high and nearly two metres wide at the top, suggesting the site was originally more substantial than the surviving records alone might imply.