A vast enclosure roughly 160 metres in diameter lies beneath arable land near Ballard, invisible to anyone walking the ground but legible from above as a cropmark, the phenomenon where buried features such as ditches or banks affect the moisture available to crops above them, causing faint but distinct variations in colour and growth that become readable in aerial imagery, particularly during dry summers.

The enclosure was identified in Google Earth aerial imagery captured on 18 July 2021, when level tillage across the site allowed the circular outline to show clearly. What defines it is the cropmark of a narrow fosse, a term for a ditch, tracing a near-complete circle across the field. The northern sector of the feature is cut by a modern east-west field boundary, but even there the enclosure does not entirely disappear; a curving soil-mark, a related but subtler surface discolouration, continues into the adjoining field to the north, suggesting the original circuit remains largely intact beneath the soil. At around 160 metres across, this is a substantial feature. Large circular enclosures of this kind in Ireland are associated with a range of periods and uses, from prehistoric ceremonial sites to early medieval enclosures surrounding settlements or ecclesiastical sites, though without excavation or further survey the date and function of the Ballard example remain open questions.

The site sits in ordinary-looking agricultural land and there is nothing visible at ground level to indicate its presence. Its existence, for now, is essentially a matter of aerial observation and the particular conditions of that July in 2021.