What emerged was a souterrain, the term used for the dry-stone underground passages and chambers built in early medieval Ireland, typically associated with nearby settlement sites and thought to have served as storage spaces, places of refuge, or both. This one is modest in scale, a chamber roughly 3.2 metres long and around 1.3 metres wide, with a connecting passage only 0.7 metres wide and 0.7 metres high, barely enough to crawl through.

The chamber had been roofed with four large limestone lintels laid across the dry-stone walls, a construction method that requires no mortar and relies entirely on the precision of the stonework and the weight of the earth above to hold everything in place. Two of those lintels had cracked and dropped into the interior over time, and the chamber itself was substantially filled with earth that had fallen in from above. Despite this collapse, dry-stone walling remained visible along the northern side of the chamber. The passage exiting at the western end ran in a roughly north-northeast to south-southwest direction before being blocked by earth and debris just inside its entrance. The chamber was oriented east to west, a detail that may carry significance in the context of early Irish construction traditions, though the record does not speculate on this. The site was identified and documented by Dr. Michael Connolly, County Archaeologist with Kerry County Council.