A ring-ditch, roughly ten metres across, sits on a gently undulating, north-east-facing slope, and it has never appeared on any edition of the Ordnance Survey six-inch maps that Irish historians and archaeologists have long relied upon for locating earthworks. The only reason anyone knows it is there at all is an aerial photograph, which picked out the faint circular cropmark that ground-level inspection entirely misses.

A ring-ditch is the surviving trace of a circular ditched enclosure, most commonly associated with prehistoric funerary or ritual activity. Over centuries, the raised elements, banks or mounds, erode or are ploughed away, leaving only the ditch cut into the subsoil. That subsoil disturbance retains moisture differently from the surrounding ground, and in the right conditions crops or grass above it will grow in a way that betrays the shape from the air, even when nothing at all is visible from the field itself. This particular site sits in company: a ring-barrow, a low circular mound typically surrounded by a ditch and bank, lies about a hundred metres to the south, and a ditch-barrow sits around fifty metres to the south-east. The clustering of these features suggests the area carried some significance in prehistory, though the livestock that have trampled the ground heavily over the years have left no surface trace of any enclosing element remaining.