That word, indications, does a lot of quiet work. Souterrains are underground passages or chambers, typically built during the early medieval period in Ireland, often used for storage or as places of refuge. Their presence here has never been fully confirmed, which gives the site an unresolved quality that more thoroughly excavated places tend to lack.

The enclosure is known as Caherbaun, or An Chathair Bhán in Irish, a roughly circular cashel, meaning a dry-stone fortified enclosure, sitting near the foot of the mountain ridge that forms the spine of the Dingle Peninsula in County Kerry. The Co. Kerry Field Club recorded the remains of a circular hut inside the cashel, measuring about twelve feet, or roughly 3.6 metres, in diameter. It was within or near this structure that the souterrain traces were observed. The site sits at Foilatrisnig, overlooking the broad sweep of Tralee Bay to the north, a setting that would have made good strategic sense for whoever built and used the enclosure, likely sometime in the early medieval period.