In a pasture field on a gentle north-west-facing slope near Newtown in County Kildare, there is a monument that is essentially invisible at ground level. No earthwork survives above the grass. What betrays its presence is the soil itself, and the way crops respond to what lies beneath. A circular cropmark roughly eighteen metres across marks the outline of what archaeologists identify as a ring-ditch, the buried remnant of a circular enclosing fosse, or ditch, that once surrounded a central area, most likely a prehistoric funerary or ritual monument.

Cropmarks form when buried features affect the moisture and nutrient content of the soil above them. A filled-in ditch retains more moisture than the surrounding ground, so the vegetation growing over it stays greener and grows taller for longer, making the buried outline readable from the air even when nothing remains on the surface. In this case, the narrow fosse appears in aerial imagery as an arc running from the east-north-east around through the south and back to the north-west, tracing most of the circle. Ring-ditches of this kind are generally associated with Bronze Age burial practice, sometimes surrounding a barrow mound that has long since been ploughed flat, sometimes representing the ditch alone where the central mound was never substantial or has been entirely eroded. The site was reported by Jean-Charles Caillere and became identifiable through Google Earth aerial imagery captured in April 2013.

Because the feature survives only as a cropmark with no surface expression, there is nothing to see on the ground. The significance of the site lies precisely in that invisibility, and in what it suggests about the density of prehistoric activity across the Kildare landscape, much of which remains buried and unexcavated beneath ordinary farmland.