The rath at Knockanacuig, in County Kerry, is one such site: a circular or near-circular earthwork enclosure, typically formed by one or more banks and ditches, that would once have enclosed a farmstead during the early medieval period, roughly between the fifth and twelfth centuries. The word rath refers specifically to this type of earthen-banked enclosure, as distinct from a cashel, which is built from stone. Kerry has an abundance of both, owing to the density of early medieval settlement across the peninsula landscapes of the south-west.

Ringforts functioned primarily as enclosed farmsteads, providing a degree of security for a family, their livestock, and their stores. The bank and ditch combination, sometimes reinforced with a timber palisade, was less about military defence and more about defining territory, deterring opportunistic cattle raids, and marking the social status of the household within. At a site like Knockanacuig, the surrounding townland name itself carries layers of older Irish, the element cnoc pointing to a hill or raised ground, which often made practical sense as a location for this kind of enclosure, offering visibility and reasonable drainage. The Kerry landscape is particularly dense with such monuments, many surviving as earthwork humps in pasture fields, their original profiles softened by centuries of ploughing, grazing, and gradual collapse.