In a field near Rosetown in County Kildare, something circular lies buried beneath the soil, invisible at ground level but legible from the air. An aerial photograph captured what is known as a cropmark, the faint but telling discolouration that appears in growing crops when buried features alter how the soil retains moisture. In this case, the cropmark traces the outline of a ring-ditch, a circular or near-circular trench cut into the earth in prehistory, most often associated with burial or ritual activity.

Ring-ditches are among the more quietly persistent traces of Ireland's prehistoric past. They typically represent the remnants of a burial mound, the encircling ditch that once surrounded a now-levelled earthen mound, or sometimes a flat cemetery with no raised element at all. The ditch itself, filled over millennia with looser sediment than the surrounding undisturbed soil, holds moisture differently, causing the crops above it to grow at a slightly different rate and colour. A single such feature at Rosetown was identified from aerial photograph GB89.O. 6, though nothing further about its dimensions, date, or any associated finds is currently recorded.