What remains visible is a lintelled entrance, the kind where flat capstones are laid across upright slabs to form a crude but durable threshold, leading downward into an earth-cut chamber that has since subsided into itself. The structure is inaccessible now, the collapse having done what centuries of concealment could not quite finish.

Souterrains are underground passages or chambers, typically stone-lined or earth-cut, that were constructed during the early medieval period in Ireland, most often in association with ringforts. Ringforts themselves are circular enclosures defined by earthen banks or stone walls, and they served as farmsteads for much of the first millennium. The souterrain attached to one was usually reached from within the enclosed area and may have been used for cool storage, as a refuge, or both. The one at Cloonygorman sits within a ringfort that survives nearby, making it possible to read the two features together even if the souterrain itself can no longer be explored. The lintelled entrance, still identifiable despite the subsidence, suggests it was once a reasonably well-constructed example of the type rather than a rough scraping in the earth.