This one in Grange, County Wexford, does the opposite. Standing in the pasture roughly five hundred metres south-east of Bannow House, on a gentle east-facing slope, there is nothing obvious to see at all. The ringfort exists, as far as a ground-level visitor is concerned, only as an absence.

What reveals it is aerial photography. A cropmark, the faint differential in how grass or crops grow over buried features, traces a circular enclosure roughly forty metres in diameter, defined by what appears to be a single fosse, that is, a ditch dug to demarcate and defend the enclosed area. There is a gap in the fosse on the south-eastern side, most likely the position of the original entrance. Ringforts of this type, known as raths, were the most common form of rural settlement in early medieval Ireland, typically enclosing a farmstead and its associated buildings within an earthen bank and outer ditch. This one, modest in size and defined by a single enclosing feature rather than the multiple rings that marked higher-status sites, would have been an ordinary farmstead once. Whatever earthworks once made it visible have since been levelled, leaving only the buried ditch to cast its ghostly outline upward through the soil and into the lens of an aircraft camera.