The site is known only from aerial photography, where the outline of an ancient enclosure emerges as a crop or soil mark, the kind of ghostly impression that the ground holds onto long after whatever stood above it has disappeared. This category of evidence, present to the eye of a satellite but invisible at ground level, is one of the quieter ways that Irish archaeology reveals itself.

The enclosure is roughly circular in shape, with a diameter of approximately 21 metres, and is defined by a fosse, which is essentially a ditch cut into the ground to demarcate a boundary or provide a degree of enclosure. Circular enclosures of this kind are found widely across Ireland and can date from the prehistoric period through to the early medieval, though without excavation it is rarely possible to assign a confident date to any individual example. What is known about this particular site comes from aerial sources, including Google Earth imagery and Ordnance Survey Ireland photographs, which between them preserve a clear enough outline to confirm the monument's presence and approximate dimensions. The record was compiled by Caimin O'Brien, drawing on details provided by Dr. Rob O'Hara, and uploaded in February 2020.

Because the enclosure has no upstanding remains, there is nothing to see at ground level in the conventional sense. The best view remains the aerial one, and anyone curious about the site would do well to start with freely available satellite imagery before visiting. Crop marks of this kind tend to show most clearly during dry summers, when differential moisture retention in the soil causes buried features to express themselves through variations in plant growth above them. The location in Cloonanna is rural County Limerick, and access to the field itself would depend on landowner permission. For most visitors, the interest lies less in standing at the spot than in understanding that the Irish landscape routinely conceals this kind of layered evidence, detectable only when the conditions and the angle of view happen to align.