The site shows up not as a physical feature but as a cropmark, the ghostly outline left when buried ditches or banks cause crops and grass above them to grow differently from the surrounding ground. Moisture retained in old filled-in ditches produces lusher, darker vegetation, while compacted ancient banks dry out earlier, leaving pale or thin growth. Seen from the air at the right moment, these differences describe a shape with remarkable clarity.

What aerial photography captured over Guigginstown on 28 June 2018 was a partial arc of a roughly circular enclosure approximately ninety metres in diameter, with what appears to be an entrance gap on its north-north-west side. That diameter places it firmly in the category of a large enclosure, well beyond the typical size of a domestic ringfort and into the range sometimes associated with ceremonial or high-status sites in the Irish prehistoric and early medieval landscape. The image, sourced from Google Earth, was brought to wider attention by Jean-Charles Caillère and recorded by Caimin O'Brien in 2019. No excavation or ground survey is documented in the available record, so the enclosure's date and function remain open questions. The entrance orientation, the scale, and the form are the only details the cropmark yields.