A cashel is a stone-walled enclosure, roughly equivalent to a ringfort but built from dry-stone rather than earthen banks, and this one at Lios Na Caolbhuí contains within its boundary the remains of three hut-sites and a souterrain, an underground stone-lined passage that typically served early medieval communities for storage or refuge.

Three huts can still be traced inside the enclosure. One of them, immediately east of centre, survives as a horseshoe-shaped depression measuring roughly 2.9 metres by 3.35 metres, ringed by grass-covered stone collapse and open to the south-east. It may once have been joined to the adjacent hut, the two structures sharing a wall or at least pressed close enough together to suggest a practical, domestic logic to the layout. The site was recorded and described by J. Cuppage in the 1986 Dingle Peninsula archaeological survey, a landmark inventory of the extraordinarily dense concentration of ancient monuments across the Corca Dhuibhne region. That density is itself part of the interest here: the Dingle Peninsula holds one of the highest known counts of early medieval stone enclosures in Ireland, and Lios Na Caolbhuí sits within a landscape where such remains are less anomalies than a kind of background texture to everyday farming land.