This earthwork near Corbally Cottage is a rath, the Irish term for a ringfort, the kind of enclosed farmstead that was built and occupied across Ireland roughly between the early medieval period and the twelfth century. Thousands survive in various states across the country, yet each one carries its own particular character, shaped by how it was used, reused, and quietly dismantled over the centuries.

This one sits on an east-facing slope and measures approximately 39 metres across. It is enclosed by an earthen bank still standing around 1.3 metres high on the exterior, with a fosse, essentially a defensive ditch, running to a depth of about 0.7 metres along the southern to north-north-eastern arc, though shallower in other sections. The bank has been quarried into at two points, to the north-north-east and the south, suggesting the site has been gradually robbed of material over time, a common fate for earthworks that sit in farmland. The fosse itself has been widened along part of its southern to western run, apparently pressed into service as a path at some point. At the north-western edge, there is a possible souterrain, an underground stone-lined passage associated with ringforts and thought to have served for storage or as a place of refuge. The interior, rather than being open ground, is now planted with trees, which lends the enclosure an unusual density when viewed from the surrounding fields.