A ringfort, or rath, is an enclosed settlement type that was widespread across Ireland roughly between the fifth and twelfth centuries; most consisted of a raised earthen bank surrounding a family's house, outbuildings, and livestock. This one at Corravilla measures about 31 metres across at its widest and 26.5 metres north to south, which is a modest but typical size. What makes it quietly interesting is how little of it now survives above ground, and how much can still be read in what remains.

The enclosing bank has been worn down almost to nothing along much of its circuit, reaching an internal height of only around 0.2 metres in places, though the outer scarp at the south-southwest still rises to 1.2 metres, giving a sense of the original profile. A shallow outer drain traces the perimeter from the south-southeast around to the north-northeast, adding another layer to what would once have been a more purposeful boundary. There is an entrance gap on the east-southeast side, though this is considered unlikely to be the original opening. The interior, described as grass-covered, had already begun to overgrow by the time it was assessed in 2005, a process that had been under way since at least 1968, gradually softening and obscuring whatever structural detail the ground once showed.