The oval hollow, roughly six metres long and just over three metres wide, runs on a north-west to south-east axis and drops to about a metre in depth. Along its sides, traces of stone-facing are still just about legible, and the uneven, stony base suggests the structural fabric of the original feature has not entirely disappeared, only subsided.

This is a souterrain, a type of man-made underground chamber or tunnel built during the early medieval period in Ireland, typically associated with nearby settlement sites and thought to have served for storage, refuge, or both. What makes its context here particularly legible is its location within a ringfort, the circular enclosures defined by earthen banks that were once the most common form of rural settlement across early medieval Ireland. The souterrain sits in the northern sector of the ringfort recorded as GA059-002, a pairing that was fairly typical: souterrains are frequently found tucked within or just beneath the interior of these enclosures. The site was noted by Claffey in 1983 and later included in the archaeological inventory of north Galway.