At Benmore in north County Kerry, a ringfort once occupied the land, its circular earthen bank enclosing the homestead of an early medieval farming family, probably sometime between the fifth and twelfth centuries. Ringforts, known in Irish as raths or lios, were the most common form of rural settlement in early medieval Ireland, typically consisting of a raised circular embankment of earth or stone surrounding a domestic space. Today, at Benmore, not a trace of this one remains above ground.

The site carries the name Cullaun Fort, or Ráth Colláin in Irish, a name that preserves a personal name, Collán, presumably that of an individual once associated with the place. It appears clearly on Ordnance Survey maps from 1841 to 1842, and again on the revised edition of 1915 to 1916, each time depicted as a circular enclosure. At some point between then and now it was levelled entirely, most likely cleared to make way for agricultural use. The maps are now the only record of its shape on the landscape.