A large collapse has opened a window into something older beneath the surface, partially backfilled but not forgotten, and local knowledge holds that beyond it, cut directly into the rock, a passage extends for around five metres heading northward, with at least two further openings nearby suggesting additional chambers.

The structure is a souterrain, an underground passage or chamber typically associated with early medieval ringforts in Ireland, where they served as places of refuge, storage, or concealment. They range from simple single passages to branching systems of chambers, and the rock-cut variety found here, rather than one built from dry-laid stone, speaks to a certain geological convenience in the local landscape. The ringfort with which this souterrain is associated sits as a discrete site in its own right, and the two are linked in the way that was common across early Christian Ireland, perhaps from the sixth to the twelfth century, when such enclosed farmsteads were a dominant feature of the rural landscape. The collapse that has partially revealed the souterrain is a reminder of how much of this archaeology still exists just below the grass, intact enough to retain its shape even as the roof occasionally disagrees.