The site appears on a 1936 Ordnance Survey six-inch map, marked within a circular enclosure, but generations of visitors, farmers, and fieldworkers since have found no visible trace of it. It is, in a practical sense, a place that exists only on paper.

A souterrain is an artificial underground structure, typically stone-lined, built during the early medieval period in Ireland, often associated with nearby settlements or ringforts. They were used variously for storage, refuge, or concealment, and many remain partly or wholly intact beneath fields that show no outward sign of disturbance. The circular enclosure at Garraneduff with which this souterrain is associated is the kind of feature often interpreted as a ringfort, the remains of an enclosed farmstead from roughly the sixth to the twelfth century. What the 1936 map recorded, whether a visible depression, a collapse feature, or simply a local tradition marked down by a surveyor, is now impossible to say. By the time the site was formally catalogued in the mid-1990s, the surface evidence had already gone.