It never appeared as an antiquity on any edition of the Ordnance Survey six-inch maps, and it is not a prehistoric monument in the conventional sense. What it most likely represents is a tree-ring, a deliberate ornamental planting associated with a landed estate, designed to be seen and perhaps to suggest something older than it actually was. At its centre sits a conglomerate boulder standing three metres high, lending the whole arrangement an air of accidental antiquity that was probably very much the point.

The enclosure sits on the demesne lands of Derk House, which stands roughly 360 metres to the south-southwest. A circular tower or folly, a separate structure of the kind built purely for visual effect rather than function, lies about 100 metres to the south-southwest as well, suggesting that the wider demesne landscape was deliberately furnished with eye-catching features in the manner fashionable among improving landlords of the eighteenth and nineteenth centuries. The tree-ring itself first appears on the 1897 edition of the Ordnance Survey 25-inch map, where it is shown as a subcircular tree-planted enclosure. When the Archaeological Survey of Ireland recorded the site in 2008, surveyors Alison McQueen and Vera Rahilly documented a circular area about 12 metres in diameter, enclosed by intermittent traces of a low earthen bank roughly two metres wide. On the southwestern side, traces of a possible fosse, a shallow defensive or decorative ditch, were noted, though the bank itself is considerably reduced on that arc, surviving mainly as a scarp about 1.35 metres high as seen from the west and north.

The site is not formally managed as a visitor attraction and sits within private demesne land, so access would depend on local arrangements. For those with an interest in estate archaeology or landscape history, the clearest modern view of the earthwork is visible on satellite imagery, where the circular canopy of beech trees shows up distinctly against the surrounding slope. If you do find yourself in the vicinity, the boulder in the northern quadrant is the most immediately striking feature, rising well above head height within the tree-ring and giving the enclosure a quality that hovers somewhere between the theatrical and the genuinely mysterious.