The souterrain here, a stone-lined underground tunnel or chamber typically constructed in early medieval Ireland for storage or refuge, was backfilled at some point before 1970, leaving the surface to tell only a partial story. What remains visible is a noticeable collapse in the ground, the kind of subtle depression that rewards those who know what they are looking at, along with two upright slabs that may once have framed the entrance to the passage below.

The souterrain sits in the centre of a cashel, a type of stone-walled circular enclosure used in early medieval Ireland to define a farmstead or settlement. The cashel at Bofickil is a separate recorded monument in its own right, and the positioning of the souterrain at its centre rather than along the perimeter is worth noting. Such underground structures were commonly accessed from within a dwelling and served a practical purpose, whether for keeping foodstuffs cool or providing a concealed retreat. The backfilling, recorded by O'Brien in 1970, means the interior is no longer accessible, and whatever the passage once contained or connected has been sealed from view for decades.