This one in Dunkip, County Limerick, does none of that. It exists, as far as anyone can tell, only in a single aerial photograph taken on the third of November 1984, and has left no visible impression on the landscape since. No ridge, no crop mark, no shadow catches it on satellite imagery. It is, in the most literal sense, a place you cannot see.

The enclosure, a term used in Irish archaeology for a defined bounded area, typically circular or sub-circular, which might once have served as a settlement, a farmstead boundary, or a ritual space, came to light not through excavation or fieldwork but through a bureaucratic necessity. Bórd Gáis Éireann, the Irish state gas company, commissioned a series of large-scale aerial photographs at 1:5000 resolution to survey the route of the Curraghleigh to West Limerick gas pipeline. One of those images, filed as BGE No. 45 and captured on 3 November 1984, showed the enclosure in improved pasture roughly 260 metres south of the Camoge River. It had never appeared on historical Ordnance Survey Ireland maps, and when later orthophotography was carried out between 2006 and 2012, nothing remained visible at ground level. A Google Earth image from 20 September 2020 confirmed the same absence. A related enclosure, recorded separately, sits approximately 330 metres to the west. The site was compiled and uploaded to the record by Martin Fitzpatrick in March 2021.

Because there are no surface remains, there is little a visitor could identify without the aerial photograph for reference. The surrounding land is improved pasture, the kind of intensively managed grazing ground that has, over decades of drainage and ploughing, erased countless subtle earthworks across the Irish midlands and west. The Camoge River lies close to the north, and the broader landscape here sits within a part of County Limerick that is well supplied with recorded prehistoric and early medieval activity, though this particular enclosure remains undated and unexcavated. Its interest lies less in what can be seen on the ground than in what it illustrates about how fragile the archaeological record is, and how much of it survives, if at all, only in the archive of a gas company's survey photographs from the 1980s.