No marker, no earthwork, no trace visible to someone walking past. What lies beneath the marshy ground on the western side of a local stream is a fulacht fia, one of the most common yet quietly mysterious monument types in the Irish landscape, and this particular example has, to all appearances, vanished entirely into the soil.

A fulacht fia is a prehistoric cooking site, typically consisting of a horseshoe-shaped mound of fire-cracked stones beside a trough and a water source. The method is ancient and practical: stones were heated in a fire, then dropped into a water-filled trough, bringing it rapidly to the boil. These sites are found in their thousands across Ireland, usually in low-lying or wet ground close to streams, which is precisely the setting here. At Corran, the site was recorded as a mound on the Ordnance Survey six-inch map produced in 1940, meaning it was at least partially visible within living memory. Sometime between that survey and more recent examination, it lost whatever surface expression it once had. The marshy ground that likely helped preserve it for millennia may also be what makes it so difficult to read from above.