There is no visible surface trace of it, no marker, no depression in the ground. It is simply there, sealed off, in a field whose Irish name, Pairc a Teampaill, translates roughly as the field of the church.

The chamber was recorded in 1934 by a researcher named Bowman, who described it as roughly seven feet long, four feet wide, and five feet high, with sides of dry stone work and a roof of large stone slabs laid flat across the top. This construction style is consistent with a souterrain, an underground stone-lined passage or chamber built during the early medieval period in Ireland, typically associated with monastic or settlement sites and thought to have served for storage, refuge, or both. What makes the Nohaval example particularly interesting is its location directly beneath the site of a round tower, those tall tapering stone towers that were a distinctive feature of early Irish ecclesiastical settlements. Round towers were themselves unusual structures, likely used as bell towers and places of refuge, and their presence generally indicates a significant early Christian site. The souterrain at Nohaval sits within what archaeologists consider a possible early ecclesiastical enclosure, suggesting layers of activity at this location going back well over a thousand years, most of it now invisible at ground level.