This is a ring-ditch, a type of monument generally understood as the eroded remnant of a prehistoric burial mound, where the surrounding ditch that once defined the base of a barrow survives long after the mound itself has been ploughed flat. What makes this one quietly interesting is not just its own near-complete circuit but the fact that it is not alone. At least one other ring-ditch sits roughly 82 metres to the north in the same field, suggesting this stretch of relatively level ground at around 91 metres above sea level once formed part of a more deliberate funerary or ritual landscape.

The townland of Ardoyne sits close to the county boundary, and the field that contains these features is already notable for what surrounds it. Around 360 metres to the north-northwest lies a separate enclosure, while in the opposite direction, less than 500 metres away, stand the remains of a ruinous church and its associated graveyard, both within the same townland. The layering here is not unusual in the Irish midlands and east, where prehistoric monuments, early medieval enclosures, and ecclesiastical sites frequently cluster in the same landscapes, each generation of settlement finding something meaningful in ground already marked by the last. The ring-ditch itself measures approximately 10 metres east to west and 10.5 metres north to south, with a continuous ditch about 1.25 metres wide. No entrance break has been identified anywhere along its circuit, which is consistent with monuments of this type whose original access, if any, would have been over or through a now-vanished upstanding element.