Two concentric circular ditches, one inside the other, lie buried beneath the soil, their outlines betrayed only from the air, where differences in crop growth trace their shape across the surface like a faint pencil drawing. The whole enclosure measures less than twenty metres across, roughly the footprint of a modest house.

This kind of site is known as a ring-ditch, a term that covers a broad range of circular or near-circular ditched enclosures encountered across Ireland and Britain. Some are the eroded remnants of Bronze Age burial monuments, others the ghostly traces of long-vanished roundhouses or small ritual enclosures. What survives at Ballybeg Middle is not the ditches themselves in any visible form, but a cropmark, the phenomenon by which buried features affect how plants above them grow, producing subtle variations in colour or height that become legible in aerial photographs taken during dry summers when the effect is most pronounced. The site was recorded from one such photograph, catalogued as GSIAP R526. The outer of the two fosses, or ditches, has been clipped at its southern edge by a field fence at some point, cutting across the ancient circuit and offering a small reminder of how ordinary agricultural life slowly encroaches on what lies beneath.