The passage is classed as inaccessible, meaning its interior can be inferred rather than explored. What remains visible above ground tells its own quiet story: a displaced roof lintel, roughly the size of a large door slab, has slipped from its original position near the south-eastern end, and through the loose stones around it the drystone side-walling beneath is just visible, like a glimpse into a sealed room.

A souterrain is an underground stone-built passage or chamber, constructed during the early medieval period in Ireland, typically between the sixth and twelfth centuries. They were built beneath or beside ringforts and cashels, and are generally understood to have served as places of refuge, cool storage, or both. This particular example sits at the centre of a cashel, which is a ringfort built from stone rather than earthen banks, the remains of which survive at the same site. The souterrain is orientated roughly north-west to south-east, and to the north-west of the fallen lintel its line can still be traced as a low surface bank, rising only ten to thirty centimetres above ground level. That gentle ridge in the grass is the compressed outline of a structure that has been sealed and slowly subsiding for a very long time. An ESB electricity pole now stands roughly four metres to the south-east, a detail that does a reasonable job of summarising how quietly these sites get absorbed into ordinary rural landscapes.