It reveals itself only from the air, as a cropmark, a phenomenon that occurs when buried features affect how crops grow above them. Soil disturbed by ancient ditches retains more moisture, and so the vegetation rooted in it tends to grow taller or greener than the surrounding crop, tracing the outline of long-buried structures in lines only an aerial photograph can read clearly.

The feature is recorded in the Sites and Monuments Record and was identified through an aerial photograph, with details communicated by T. Condit and referenced in Mac Shamhráin's 1984 survey. Its almost perfectly circular plan, and a local tradition associating the grounds of Belcamp Hall with a ringfort, suggest this may be the remnant of just such an enclosure. A ringfort, to give the briefest context, was a type of enclosed farmstead common in early medieval Ireland, typically defined by one or more earthen banks and ditches. The cropmark sits roughly 70 metres north of a steep scarp that drops down to the Belcamp River, a position that would have made practical sense for a settlement; close to water, on ground with some natural protection on one side. The site sits within the grounds long associated with the Oblate College at Belcamp Hall.

Because the ring-ditch produces no surface expression whatsoever, there is nothing to see on a visit to the area in the conventional sense. The cropmark is visible on aerial imagery, including Bing satellite view, and that is really where the site is best appreciated. If you have access to aerial mapping platforms, the almost circular trace can be picked out in the field that formerly served as a college playing pitch. The best conditions for cropmark visibility are typically during dry spells in late spring or summer, when differential moisture in the soil has the most dramatic effect on crop growth above. On the ground, there is only a flat field, with the land falling away sharply to the south towards the small river below.