A few displaced stones sit at its base, and that, more or less, is all that remains. To an untrained eye it might read as nothing more than a dip in the pasture, but the shape and context suggest something more deliberate: the collapsed remains of a souterrain, an underground stone-lined passage or chamber built during the early medieval period, typically used for storage, refuge, or both.

The hollow sits in the south-eastern quadrant of a ringfort, the circular earthwork enclosures that dot the Irish countryside in their thousands and represent the farmsteads of early medieval families, broadly datable to the period between the sixth and twelfth centuries. Souterrains were a fairly common feature within such enclosures, though their precise function varied. This one has caved in on itself, leaving only the long curving depression and the scattered stones that once lined or roofed it. It is recorded in the Archaeological Inventory of County Galway, Volume II, compiled by Olive Alcock, Kathy de hÓra, and Paul Gosling, published in 1999, which gives the site its measured description and its place in the broader catalogue of North Galway archaeology.