The mound is modest, about a metre across, and sits in the western half of a rath, the kind of circular earthwork enclosure that medieval Irish farming families built around their homesteads. It is easy to miss. But local knowledge has long held that this unassuming rise marks the blocked entrance to a souterrain, an underground stone-lined tunnel or chamber typically used in early medieval Ireland for storage, refuge, or both.

At some point in the past, a gap or cavity was still visible at the surface, flanked by two stones that may have been roofing lintels left in their original position. That opening has since been closed over, leaving only the slight swelling of the ground to suggest what lies below. There is also a faint linear feature extending to the west-southwest from the rise, barely perceptible at ground level, which may trace the direction and extent of the underground passage itself. The rath it belongs to is a recorded monument in its own right, and the souterrain would have been a deliberate architectural addition to that enclosure, dug and roofed by whoever once lived within the earthen banks above it.