A depression in the earth is the only outward sign of it now, a hollow that archaeologists read as a probable collapsed souterrain, one of those underground stone-lined passages or rooms that early medieval communities built beneath and beside their settlements. Souterrains were typically used for storage or refuge, cool and hidden from view, and they were often constructed within or close to ringforts, the circular enclosed farmsteads that were the most common form of rural settlement in Ireland from roughly the sixth to the twelfth century.

This particular souterrain sits in the centre of a ringfort, which is itself a recorded monument in the area. The combination is not unusual in itself, souterrains are frequently found in association with ringforts across Munster and beyond, but the detail that draws the eye here is the uncertainty that surrounds it. There is no confirmed excavation, no measured plan, no inventory of what the underground space contains or once contained. There is a hollow in the ground, and an inference drawn from its shape and location. Much of what survives of early medieval Ireland exists in exactly this provisional state, present enough to be noted, too fragile or too buried to be fully known.