It measures roughly 31.2 metres in internal diameter, enclosed by a low scarp and a shallow fosse, the term for a ditch cut around the perimeter of a defensive or enclosed space. What makes it quietly remarkable is how thoroughly the landscape has absorbed it: the boundary of the old enclosure has been folded into the existing field boundary, so that what was once a deliberate human construction now reads simply as a hedge line or a fence post on an ordinary Cavan farm.

This is a rath, the Irish term for a ringfort, a class of monument built predominantly during the early medieval period, roughly between the fifth and twelfth centuries. Ringforts were typically the enclosed farmsteads of farming families, their earthen banks and ditches serving as much to pen livestock and signal status as to provide serious military defence. Thousands survive across Ireland in varying states of preservation, but many, like this one, have been gradually eroded by agricultural activity over the generations. Here, the original entrance, which in better-preserved examples often faces east or south-east, can no longer be identified at all. The scarp and fosse remain, but only just, their profiles dulled by time and the routine work of the land around them.