It does not announce itself with upstanding stones or a visible bank. Instead, it shows up only from the air, and only under the right conditions, as a cropmark: a faint ring roughly forty metres across, where the soil's hidden geometry causes the plants above it to grow at a slightly different rate or colour than everything around them. That difference, invisible at ground level, becomes legible when viewed from altitude.

Cropmarks form when buried features, whether a filled-in ditch, a collapsed wall, or a compacted floor, alter how moisture moves through the soil above them. Crops and grasses respond accordingly, growing taller and greener over ditches that retain water, or shorter and paler over buried masonry that impedes root growth. In this case, a circular shape around forty metres in diameter emerged in orthoimages taken from Google Earth and a Digital Globe orthophoto captured between 2011 and 2013. The site sits in land that has been reclaimed for agriculture, which means any original surface features were likely levelled or obscured long before aerial photography existed to catch what remained underground. The circular form is consistent in scale with a ringfort, the most common type of enclosed rural settlement in early medieval Ireland, though without excavation the nature and date of the feature cannot be confirmed.