The structure sits within reclaimed pastureland, and the fact that it now lies inside a domestic building gives it an odd double life, part ancient monument, part domestic foundation, entirely unexpected.

The passage is a souterrain, a type of underground chamber or tunnel built from drystone construction, meaning the stones are laid without mortar, relying on their own weight and careful placement to hold together. Souterrains are found across early medieval Ireland, where they served variously as storage spaces, refuges, or escape routes. This example runs roughly south-east to north-west, measuring just under five metres in length, and widens noticeably towards the north-western end, with the ceiling height varying between 0.66 and 1.33 metres throughout its length. Entry into what survives is at the south-eastern end, though a two-metre depression filled with collapsed stone nearby suggests the passage once extended further in that direction. Perhaps the most intriguing feature is a blocked-up creep at the northern end of the western wall. A creep, in this context, is a low connecting opening between chambers, typically just large enough to crawl through. This one runs roughly east-north-east to west-south-west and may connect to a second chamber that has not yet been fully investigated or confirmed.