This one, in the townland of Ballymahony, is something older and more deliberate: a ring barrow, a type of prehistoric funerary monument in which a central raised platform is encircled by a ditch and sometimes an outer earthen bank, the whole arrangement marking a burial or ceremonial site.

The monument only came to formal attention as a confirmed site after a ground inspection followed up an aerial photograph. It had been listed merely as a potential site in the Record of Monuments and Places in 1996, the kind of cautious designation given to cropmarks or earthwork shadows spotted from above but not yet verified on the ground. On inspection, the structure revealed itself clearly enough. The central platform is roughly subcircular, measuring about 11.3 metres north-east to south-west and 10.1 metres north-west to south-east, and rises between 0.3 and 0.5 metres above the surrounding ground. Around it runs a fosse, which is simply a ditch, between 4.7 and 5.7 metres wide and up to half a metre deep. Beyond that, on the western and north-western arc, the remains of an outer bank survive, roughly 3.3 metres wide and 0.3 metres high. The southern and western sections of both the fosse and outer bank have been cut through by a drainage ditch and a field bank, the ordinary agricultural interventions of some later century. No original entrance or causeway can be made out anywhere along the circuit. Inside, the platform slopes downward from north-east to south-west, and a small grass-covered rise in the northern part of the interior, barely 0.2 metres high, may represent a pre-modern spoil heap rather than any deliberate feature of the original design.