A cropmark, the faint differential in how crops or pasture grow over buried or compacted soil, reveals the outline of an enclosure roughly 78 metres in diameter, a feature so thoroughly levelled over the centuries that it leaves no trace at ground level. It was identified on a Google Earth orthoimage taken in September 2019, one of countless such discoveries made possible when satellite imagery is examined systematically across the Irish landscape.

The site at Ballynatona was recorded by Caimin O'Brien and uploaded to the archaeological record in October 2021. The enclosure's scale is notable. At around 78 metres across, it falls into the category of large enclosures that archaeologists sometimes associate with early medieval settlement, ceremonial use, or high-status sites, though without excavation the function of any particular example remains open. Immediately to the south lies a possible ringfort, a roughly circular earthwork of the kind built in their thousands across Ireland during the early medieval period, typically serving as a defended farmstead for a single family or extended household. The proximity of the two features is worth noting, though whether they were contemporary or represent activity from different periods cannot be determined from surface evidence alone. The surrounding pasture is described as level, with moderate views in all directions, the sort of open, unassuming ground that rarely draws a second glance.

Because the enclosure is a cropmark, there is nothing to see on the ground in the conventional sense. The surrounding fields are working farmland, and access would require landowner permission. The best view of the feature remains the one that revealed it in the first place, aerial or satellite imagery. Anyone with an interest in landscape archaeology can locate the general area using the coordinates associated with the record and examine the Google Earth imagery themselves, ideally during dry summer conditions when cropmarks tend to be most pronounced. The site is a reminder that a great deal of what happened in early Irish history is still decipherable, just not always from ground level.