It shows up not as a physical feature but as a cropmark, the kind of ghostly impression left when buried archaeological features subtly alter how the grass or grain above them grows. Circular ditches of this type tend to appear darker or lusher in dry summers, when the deeper soil within the filled ditch retains more moisture than the surrounding ground. The ring at Guigginstown measures approximately ten metres in diameter, which puts it within the range of a ring-ditch, a class of monument typically associated with prehistoric funerary or ritual activity.

A ring-ditch is, in its simplest form, the remains of a circular trench, often all that survives of a burial mound after centuries of ploughing have levelled the earthwork above it. Many such sites in the Irish midlands date to the Bronze Age, though without excavation it is not possible to assign a date to any individual example. This particular feature came to light through aerial imagery captured on 28 June 2018, when dry conditions apparently made the cropmark legible enough to be recorded. The site was noted by Jean-Charles Caillère and compiled by Caimin O'Brien in 2019. That the feature had gone unrecorded until a satellite photograph happened to catch the right conditions on the right summer day is a reminder of how many monuments across the Irish landscape remain effectively invisible at ground level, waiting for a dry June to give them away.