The outline measures just five metres across, defined by a bank barely half a metre high on the inside and slightly less on the outside, and yet that modest geometry almost certainly marks the footprint of a dwelling where someone once lived.

A rath, sometimes called a ringfort, is a circular enclosure defined by one or more earthen banks and ditches, built predominantly during the early medieval period in Ireland, roughly between the fifth and twelfth centuries. They served as farmsteads and homesteads for farming families across the island, and many thousands survive in various states of preservation. Within the Carrowcor example, this smaller subcircular feature sits in the northern half of the interior, tucked close to the eastern bank of the enclosing rath. Its dimensions, a bank around 1.3 metres wide forming a rough circle of five metres in diameter, are consistent with a single-roomed structure of the kind that would have been constructed from timber, wattle, or turf, leaving only the earthen collar as evidence of its existence.