A souterrain, which is an artificially constructed underground passage or chamber typically built during the early medieval period, has been identified here, associated with the ringfort beside it. These stone-lined tunnels were used by early Irish farming communities for a range of purposes, most likely food storage, given the cool, stable temperatures underground, and possibly as places of refuge during raids.

What makes this particular site worth pausing over is a subtle detail visible at the surface: a depression towards the centre of the ringfort's interior, which may indicate a collapsed chamber below. Souterrains were often built with corbelled roofs or lintelled ceilings that, over many centuries, can give way under the weight of accumulated soil, leaving the ground above them to sink. The relationship between the souterrain and the ringfort, a type of enclosed farmstead defined by a circular earthen bank and ditch that was common across Ireland from roughly the sixth to the twelfth centuries, suggests this was once a working agricultural settlement. The souterrain sits in the south-eastern quadrant of that enclosure, a position not uncommon for such features, which were frequently tucked into the interior edge of the surrounding bank.