Lift that lintel and you are looking into a souterrain, an underground stone-lined passage of the kind built throughout early medieval Ireland, typically for storage or refuge. This one is well-built in drystone construction, meaning no mortar, just carefully chosen and placed stone, and its proportions give a sense of how deliberately cramped these structures were by design. The main passage runs roughly north to south, measuring just under two metres long, sixty centimetres wide, and ninety centimetres high, narrowing toward its rounded end-walls. A person would have to crouch, or crawl.

What makes this site quietly complex is what lies beyond that first passage. From its south-eastern corner, an earth-cut creepway, a low connecting tunnel cut directly into the soil rather than lined throughout, leads into a second passage running east to west. The upper courses of this second chamber are slightly corbelled, meaning the stones are laid so that each course projects a little further inward than the one below, forming a rough arch overhead. The technique adds structural stability without requiring a single spanning capstone. The platform above measures 18.5 metres by 13 metres overall, and toward its northern end the sod-covered foundations of two huts survive, suggesting this was once a settled enclosure of some kind rather than an isolated underground feature. The souterrain sits close to a modern field boundary, one of those cases where contemporary land management and ancient archaeology share the same few metres of ground without much acknowledgement of the fact. Roof collapse now blocks access beyond the second passage, so the full extent of the system, if it continues further, remains unconfirmed.