It sits within a ringfort, one of the circular enclosures that dot the Irish countryside as remnants of early medieval farmsteads, and it runs roughly north to south for about eight metres, a metre wide and a metre deep. That description fits a souterrain, the underground passage or chamber that ringfort inhabitants sometimes constructed for storage or refuge, but the abundance of natural rock outcrop in the interior of this fort leaves open the possibility that what looks like deliberate construction may instead be the scar left by quarrying activity. The trench is straight-sided, which suggests human intent, yet the geology of the place makes certainty elusive.