A souterrain is a man-made underground structure, typically built during the early medieval period as a place of refuge, storage, or concealment, and they are relatively common across Ireland, though most have been properly excavated or at least surveyed. This one survives mainly as local memory and a suggestive pile of stones.

The evidence here is thin but intriguing. The site is associated with a ringfort, the circular enclosed settlements that dot the Irish countryside and date broadly from the early medieval period, roughly 500 to 1200 AD. Local tradition holds that a souterrain lies within it, and a mound of stones near the centre of the enclosure is thought by some to mark the original entrance. That combination, an oral tradition and a physical anomaly in the ground, is often precisely how buried archaeology first comes to light, though in this case it has remained at that tentative stage.