This one, sitting in wet pasture in the townland of Curraghkilbran in County Limerick, does none of that. It exists, for the most part, as a ghost in the grass, a circular cropmark roughly thirty metres in diameter that becomes legible only from the air, when differences in soil moisture and crop growth trace the outline of whatever once stood here. It never made it onto the historic Ordnance Survey Ireland maps, which means it passed unrecorded through the entire period of systematic Irish cartography.

The enclosure came to light not through excavation or academic survey but through an unlikely intermediary: aerial photography commissioned for the Bórd Gáis Éireann Curraleigh West-Limerick gas pipeline, taken on the 3rd of November 1984. Infrastructure projects have a long history of inadvertently turning up archaeology, and this is a quiet example of that pattern. The pipeline photographs, shot at a scale of 1:5000, picked out the circular form clearly enough to log it as a distinct site. It has since been confirmed by Digital Globe orthoimagery taken between 2011 and 2013, and is visible on Google Earth. The site record was compiled by Martin Fitzpatrick and uploaded in October 2021. A related enclosure, recorded separately, lies just 75 metres to the north-east, suggesting this corner of south County Limerick may have been more densely organised in the past than the blank historic maps implied.

The enclosure lies around 430 metres west of the River Aherlow, which here marks the townland boundary with Keeloges. Because it leaves no visible surface trace, there is nothing to find on foot in any conventional sense; the wet pasture offers no upstanding earthwork, no visible bank or ditch. The site is of most interest to those who engage with aerial and satellite archaeology, and the Google Earth imagery remains the clearest way to see the cropmark for yourself. If you are in the area and curious about the landscape context, the River Aherlow and its valley provide some orientation, but the enclosure itself will not reward a visit the way a cashel or ringfort might. Its interest lies precisely in that invisibility, in the fact that an entire circular enclosure could sit unnoticed beneath a field for so long, waiting to be read from the sky.