Somewhere beneath the farmland of Ballymount in County Kildare, a circular enclosure roughly thirty metres across has been quietly waiting to be noticed. It is not visible to someone walking the fields. Instead, it announces itself only from the air, and only under the right conditions, as a cropmark, the faint but legible trace of a buried ditch that causes crops growing above it to ripen at a slightly different rate or colour than those alongside. That ghostly difference in vegetation is, in many cases, all that remains of a ringfort, the most common type of early medieval settlement in Ireland, typically a circular area enclosed by an earthen bank and ditch, or fosse, where a farming family would have lived perhaps somewhere between the fifth and twelfth centuries.

This particular enclosure was first identified in July 1989 by Dr. Gillian Barrett, who recorded it as a positive cropmark from aerial photograph GB89.AF.31. The photograph shows the fosse describing an almost complete circle, with two gaps breaking the line: one at the east, most likely the original entrance, and a second at the south-southwest. Whether that second gap represents a deliberate secondary entrance or a later disturbance to the buried ditch is not clear from the aerial evidence alone. The site has since been revisited using more recent satellite imagery, with Google Earth aerial photographs from June 2018 offering a further view of the cropmark pattern in the Kildare landscape.