Within a ringfort at Kilcolman in County Cork, tradition holds that two souterrains once had entrances here, one opening into the fosse to the west, the other accessible from somewhere within the interior. No visible surface trace of either survives today.

Souterrains are underground stone-lined passages or chambers, typically associated with early medieval settlement in Ireland, roughly the sixth to twelfth centuries. They are found in considerable numbers throughout the country, often attached to ringforts, the circular enclosed farmsteads that dot the Irish landscape. Their purpose is still debated; storage, refuge, and ventilation for underground dairy keeping have all been proposed. What makes Kilcolman's example notable is the reported presence of two separate entrances, one inside the enclosure and one in the fosse, the defensive ditch surrounding it, which would have been an unusual arrangement suggesting either a complex internal layout or, perhaps, a means of concealed exit. The detail comes from a record by Ó Ríordáin dating to 1932, placing this as a known site for nearly a century, even as the physical evidence has long since vanished beneath the ground.