Roughly 25 metres across in both its main axes, it belongs to a class of ancient enclosures once defined by a fosse, a shallow ditched boundary dug around a central area, though here the southern arc of that ditch appears to have been lost entirely, leaving the ring incomplete even in the aerial record.

The site sits at the tip of a short northeast-to-southwest spur of raised ground, a position that would have made reasonable practical sense for whoever enclosed it, offering a slight natural elevation on at least two sides. What makes it particularly easy to overlook is that a later field bank and a townland boundary, marking the line between Ballinvally to the southwest and Curratubbin Upper to the northeast, have been laid directly over the enclosure, effectively erasing it from the working landscape. Its existence came to light only when Simon Dowling noticed the cropmark on Google Earth imagery captured on 14 July 2018. Cropmarks of this kind appear when buried features such as ditches retain more moisture than the surrounding soil, causing the vegetation above them to grow differently, producing faint variations in colour or height that become readable from above, especially in dry summer conditions.

There is no meaningful visitor experience to be had here in the conventional sense. The enclosure leaves no surface trace, and without the satellite image it would be entirely unreadable on the ground. Its interest lies less in what can be seen than in what the aerial record quietly preserves, a circular boundary from an unknown period, folded under centuries of agricultural reorganisation and now straddling the boundary of two townlands as if it never existed.