It only reveals itself from the air, and only under the right conditions: when crops growing above the buried ditch, or fosse, that once defined its circumference respond differently to the soil beneath them, producing a faint but legible ring in aerial photography. That photograph, catalogued as GB89.T.20, is the primary reason the site is known to exist at all.

What the photograph shows is a large curvilinear enclosure, its outline incomplete but still coherent enough to suggest a substantial circular boundary. A fosse, essentially a ditch dug to demarcate or defend a space, would originally have defined the perimeter. Enclosures of this scale in Ireland are associated with a range of functions and periods, from early medieval ringforts used as farmsteads to earlier ceremonial or territorial boundaries. The cropmark suggests the fosse has been ploughed out or silted over across centuries of agricultural use, leaving no surface trace. Adding a further layer of disruption, a modern trackway leading to a nearby farm cuts directly across the enclosure, bisecting it and making the original form even harder to read on the ground. The site survives, in a sense, only as a negative impression in the earth, visible only when the landscape itself decides to speak.