In the marshy ground of Boystown in County Wicklow, there may or may not be an enclosure, depending on how much weight you give to a single aerial photograph taken in 1973. What the photograph appeared to show was a polygonal enclosure, a roughly many-sided boundary feature of the kind sometimes associated with early settlement, ritual use, or agricultural organisation in the Irish landscape. On the ground, there is nothing to see at all.

The record stems from a Geological Survey of Ireland aerial photograph, reference GSI N 332/333/356, shot in 1973. From the air, the outline of a possible enclosure seemed to emerge from the flat, wet terrain, the kind of cropmark or soilmark that can briefly materialise in certain light or seasonal conditions when buried or long-vanished features subtly alter the vegetation above them. Aerial archaeology of this kind has revealed an enormous amount about the Irish landscape, precisely because so many earthworks have been ploughed out, built over, or simply absorbed back into the ground over centuries. But a cropmark read from a single photograph, with no corroborating survey and no surface trace, sits at the tentative end of the evidence spectrum. The site remains classified as possible rather than confirmed.