There is nothing to see, no opening, no depression, no stonework poking through the soil, but local knowledge has long held that an underground passage runs outward from the southeastern bank of a nearby ringfort, detectable only by the faint resonance of earth over empty space.

The structure in question, if it survives intact, would be a souterrain: a man-made underground passage or chamber, typically constructed from drystone walling and roofed with large flat slabs, built during the early medieval period in Ireland as a place of refuge, storage, or both. Souterrains are commonly found in association with ringforts, the circular enclosures defined by earthen banks and ditches that served as farmsteads for much of the first millennium and into the early medieval period. In this case, the ringfort itself has been recorded separately, and the suspected passage lies outside its bank to the southeast, which is itself a known arrangement: some souterrains extended beyond the main enclosure, offering an exit route away from the defended interior. What makes this particular example notable is precisely what is absent. No visible surface trace has been recorded, meaning its existence rests entirely on the spoken tradition of people familiar with the land, and the peculiar sound the ground makes when you walk across it.