The uncertainty is part of what makes the site quietly interesting. A rath is a ringfort, typically an enclosed circular homestead of early medieval date defined by one or more earthen banks, and this one contains, or once contained, a souterrain, an artificially constructed underground passage or chamber often used for storage or refuge. The problem is that nobody can quite say where it has gone.

The souterrain appears clearly on the first edition Ordnance Survey six-inch map of 1837, marked in the northern half of the rath and annotated simply as 'Cave', indicated as a circular feature. By the time the 1919 edition of the same map was produced, it had vanished from the record entirely. Whether it was filled in, collapsed, or simply overlooked by later surveyors is unknown. On the ground, the eastern half of the rath interior shows no obvious trace of it, and dense overgrowth prevented a thorough inspection of the western half. The most suggestive clue that survives is a D-shaped raised area near the centre of the rath interior, tentatively identified as a possible hut site, which may mark where the souterrain lies beneath the surface.