Not a ruin, not an earthwork worn to stumps, but a sunken water-filled hollow ringed by trees, with no visible trace of whatever structure once merited the designation. It is the kind of site that raises more questions than it answers, and that is precisely what makes it worth knowing about.

The Ordnance Survey mapped this low rise in pasture at Corry across different editions, and each one tells a slightly different story. The OS Fair Plan showed a roughly subcircular enclosure planted with trees and labelled 'Fort', suggesting something legible enough on the ground to be recorded with confidence. By the 1837 edition of the six-inch map, the enclosure itself had already dropped away from the record, leaving only a circle of trees, though the designation 'Fort' remained. By the time of the twenty-five-inch survey, completed in 1911, what was drawn looked more like a polygonal pond than any kind of defensive or ceremonial earthwork. In Ireland, the word 'fort' on older maps almost always refers to a ringfort, a circular or roughly circular enclosure defined by one or more earthen banks and ditches, used from the early medieval period onward for settlement and farming. Whatever this one originally was, the landscape had quietly absorbed it across the course of less than a century of cartographic record, leaving the trees as the only above-ground evidence that something was once there at all.