A cashel is a type of early Irish stone-walled enclosure, typically circular, used to define a farmstead or settlement, and this one at Foilatrisnig has survived in enough detail to show not just the main structures but a curious circular depression roughly 3.5 metres across adjoining the eastern side of the second hut. That hollow, ringed by a low band of grass-grown rubble reaching up to 1.3 metres in height, suggests a further ancillary structure whose original purpose is not recorded.

The site looks out across Tralee Bay towards Kerry Head and the town of Tralee itself, and down the length of the Glannagalt river valley, a combination of vistas that suggests whoever chose this location was as interested in surveillance or orientation as in shelter. The ridge separates Glanmane to one side from Glannagalt to the other, placing the settlement at a kind of natural threshold between two named landscapes. The details of the site were recorded and published by J. Cuppage in the 1986 Corca Dhuibhne archaeological survey of the Dingle Peninsula, a systematic effort to document the extraordinary concentration of early monuments in that part of Kerry.