On a gentle north-east-facing slope at Ballyva in County Cork, a ringfort, known in Irish as a rath, once occupied the ground in a manner substantial enough to leave a lasting impression on community memory. Ringforts were enclosed farmsteads of the early medieval period, typically circular in plan and defined by one or more earthen banks and ditches. This one has been levelled over time, most likely through centuries of agricultural activity, though a portion of its eastern bank can still be traced as a low outline in the grass.

What makes the site more than just a flattened earthwork is the presence of a souterrain in its south-western quadrant. Souterrains are stone-lined underground passages or chambers, constructed during the early medieval period and associated with ringfort settlements across Ireland. Their exact function is still debated, but they are generally thought to have served for cool storage, as places of refuge, or both. The survival of a souterrain beneath a fort that has otherwise been all but erased at ground level is a reminder that a great deal of the Irish archaeological record exists underground, invisible to a casual eye but present nonetheless. Local tradition, holding onto the knowledge that this was once a fort, bridges the gap between what can be seen and what has been lost.