Set into a south-facing hillside in the townland of Kilkinnikin in West Cork, the enclosure sits at an angle to the natural slope, requiring its makers to cut back into the earth on the north-western side and build the ground up on the south-eastern side to produce a level interior. The result is a platform that reads as nearly flat when you stand inside it, yet is held in place by two quite different earthworks on opposite sides.

A ringfort, or rath, is an enclosed farmstead of the early medieval period, typically dating from roughly 500 to 1000 AD, defined by one or more circular banks thrown up from an inner ditch. They are among the most common archaeological monument types in Ireland, yet each one carries its own logic in relation to its particular piece of ground. At Kilkinnikin, the enclosure measures approximately 27.4 metres north to south and 30 metres east to west. On the south-south-west to east-north-east arc, the earthen bank rises to around 1.8 metres. On the opposing arc, the builders used a scarp, a cut face of earth rather than a built-up bank, which stands to a greater height of approximately 2.3 metres where it retains the hillside. The distinction between these two forms of boundary on the same enclosure reflects a practical response to the local topography rather than any standardised design.