These corbelled structures, built without mortar by stacking flat stones inward until they meet at the apex, are scattered across the Dingle Peninsula in considerable numbers, but what makes one of the Fán examples worth pausing over is a feature that sets it apart from the standard form: a small covered chamber opening off its northern side.

R. A. S. Macalister noted the sites of the two clochans here as far back as 1899, placing them on record at a time when serious fieldwork on the peninsula's early medieval remains was still in its infancy. A later survey by Curran added more detail, describing one clochan as roughly five metres in diameter, with that curious annexe to the north. A covered chamber attached to a clochan is unusual; the function of such spaces is not always clear, though storage, sleeping, or liturgical use have all been suggested in comparable contexts elsewhere. Whether the chamber at Fán was a practical addition or something more deliberate is a question the stones themselves do not answer straightforwardly.