On the north-eastern slopes of a ridge in the farmland of Pollacorragune in County Galway, a ringfort once occupied a circle roughly twenty-five metres across. Today, the most a careful visitor might detect is a low curving scarp, a subtle change in the ground's profile running from the north-east to the south-east of where the enclosure once stood.

Ringforts, known in Irish as raths when formed by earthen banks and ditches, were the most common form of rural settlement in early medieval Ireland, typically serving as enclosed farmsteads for a single family and their livestock. The Pollacorragune example was recorded on the first edition of the Ordnance Survey six-inch map, which shows it as a circular enclosure already intersected by field boundaries, suggesting that agricultural reorganisation had begun eating into it even before that survey was completed. The process continued steadily. By the time the third edition of the same map was published in 1932, a field boundary at the north-west had truncated what remained. Decades of farming have since reduced the rest to that barely perceptible scarp.