Known in Irish as Lios an Bhranair, and in anglicised form as Lissabranner, the site looks at first like a cashel, the dry-stone ringfort type common across Munster, where a roughly circular wall of stacked stone once enclosed an early medieval farmstead or defended dwelling. The wall here stands 1.5 metres high and 0.8 metres wide, running in a neat ring some 18 metres in diameter. But look closely and something is off: there is no entrance gap, and mortar appears in places, both features that are inconsistent with genuine early medieval construction. The wall, it turns out, may have been substantially rebuilt in modern times, or possibly built entirely from scratch, though apparently following the curve of an earlier structure.

The Irish name offers a small clue about origin. Lios an Bhranair translates roughly as the fort of the fallow ground or uncultivated land, suggesting the spot carried some significance in local memory long before any wall stood there in its current form. A cashel is a type of ringfort built from stone rather than earthen banks, and they were typically constructed between roughly the sixth and tenth centuries as enclosed farmsteads for early Christian-era farming families. Whether this particular site preserves the genuine footprint of such a fort beneath its reconstructed wall, or whether the original cashel has simply left a mark in the landscape that a later hand chose to honour or exploit, is not entirely clear. Researchers working from a 1986 Dingle Peninsula archaeological survey noted the ambiguity directly, leaving the question open. Inside the enclosure, a small plantation of sycamore trees has taken root, giving the place the slightly managed, slightly forgotten quality of somewhere that has been attended to without quite being understood.