What marks this site at Fardystown is a vegetation crop mark, a phenomenon where buried features influence how plants above them grow, revealing their outlines to an aerial camera in ways invisible at ground level. The circular area measures approximately sixty metres in diameter, defined by a single fosse, essentially a ditch that once formed the defensive perimeter of the enclosure.

Ringforts, known in Irish as raths when formed primarily from earthen banks and ditches, were the most common form of rural settlement in early medieval Ireland, typically associated with farming families of some local standing. The ditch at Fardystown would originally have had a corresponding internal bank, and the enclosed space would likely have sheltered a homestead and its inhabitants. That the feature here is defined by only a single fosse suggests a relatively modest enclosure rather than one of the more elaborately defended examples with multiple concentric ditches. The site sits on fairly level, low-lying ground, a landscape type that tends to preserve such marks well precisely because the soil conditions allow buried features to affect plant growth above them in consistent and readable ways.