Within the grounds of Rathcoffey Demesne in County Kildare, a circular enclosure survives not as a visible earthwork but as a ghost in the grass, a cropmark roughly 25 metres in diameter that only becomes legible from the air. Cropmarks form when buried features, ditches, walls, or filled pits, influence how vegetation grows above them; in dry summers, the differential moisture retention causes crops or grass to ripen unevenly, tracing the outline of whatever lies beneath. A modern field boundary cuts straight across this one, indifferent to the archaeology underneath.

The enclosure was identified from Google Earth aerial imagery photographed on 28 June 2018, a date that likely captured the kind of dry conditions that make such features visible. It sits approximately 80 metres to the south-west of a previously recorded enclosure, already catalogued in the Sites and Monuments Record. Whether the two share an origin, or represent activity from different periods entirely, is not yet known. Circular enclosures of this general scale in Ireland are most commonly associated with early medieval settlement, the enclosed farmsteads known as raths or ringforts, though without excavation or further survey the function of this particular example remains an open question.