A souterrain is an underground stone-lined passage, usually associated with early medieval settlement, built partly for storage and partly as a place of refuge. The one recorded here was part of a circular enclosure, the kind of enclosed settlement that was common across early medieval Ireland, and it was noted on Ordnance Survey maps as a "cave" sitting within that enclosure. That label has since disappeared, and so, largely, has the site itself.

The two editions of the Ordnance Survey maps tell a quiet story of loss. The 1841 to 1842 edition records both the circular enclosure and the cave within it. By the time the 1915 to 1916 revision was made, the cave marking had vanished from the cartographic record, suggesting that by then its presence was no longer obvious enough to note. Today the enclosure has been levelled entirely, with one exception: a short stretch of the original enclosing bank in the north-west corner has survived because it was absorbed into a field boundary. The old earthwork became useful as a modern dividing line between fields, and so that fragment endured while everything else was cleared away.

What remains is less a monument than a trace. The fieldbank in the north-west corner of the site is the only physical evidence that something more substantial once stood here, and it would be easy to pass it without any awareness of what it represents. The souterrain itself is unexcavated or at least unrecorded in any accessible detail, leaving open the question of what, if anything, survives beneath the ground.