Somewhere in the flat, well-drained pasture of Rathgorragh, a circular rise in the ground marks the remains of an early medieval ringfort, a type of enclosed farmstead that once formed the basic unit of rural settlement across Ireland. What makes this particular example quietly interesting is its own topography: the interior of the raised platform, rather than sitting flat or domed, is slightly concave, as though the ground has gently subsided or been shaped that way deliberately.

The earthwork measures roughly 42.5 metres in diameter, with the raised platform reaching about a metre in height at its south-western edge and rising to around three metres elsewhere. A fosse, the broad ditch that would originally have encircled the interior platform as a means of defence or demarcation, survives along the western, northern, and east-south-eastern arc. It is four metres wide and about a metre deep where it remains open, though it has been filled in around much of the circuit. There are also faint traces of what may be an outer earthen bank at the north-western side, which would suggest this was once a more elaborate enclosure than a simple single-bank rath. The site was recorded from aerial photography in 2005, one of the quieter ways in which features that have become almost invisible at ground level are still recognised in the landscape.