This one in Ballingayrour, County Limerick, announces itself with almost nothing at all, which is precisely what makes it interesting. The site is recorded not because anyone found anything on the ground, but because a circular shape appeared briefly in aerial photographs taken during a gas pipeline survey, and has since more or less vanished back into the landscape. What may once have been a circular enclosure, the kind of enclosed farmstead or defended homestead common across early medieval Ireland, is now, at best, a wet patch in a reclaimed field.

The site came to light on 11 September 1982, when Bórd Gáis Éireann commissioned aerial photography along the route of the Curraleigh West to Limerick gas pipeline, recorded on film reference BGE 1/50000 50. Analysts studying those images identified a potential circular enclosure in reclaimed pasture, located roughly 125 metres north of a watercourse and 40 metres west of the townland boundary with Knockuregare. Circular enclosures of this type, sometimes called ring forts or raths, were among the most common settlement forms in early medieval Ireland, and many survive only as cropmarks or soil shadows visible from the air. This one was never marked on Ordnance Survey Ireland historic maps, which suggests it had already lost whatever surface expression it once had long before systematic mapping began. By the time OSi orthophotography was taken between 2005 and 2012, no surface remains were visible at all. A Google Earth image from 28 June 2018 does show a wet area and a small pond feature in the reclaimed grassland, which may correspond to the shape seen in the 1982 aerial, though the connection remains tentative. The record was compiled by Martin Fitzpatrick and uploaded in May 2021.

There is no path to this site and nothing to see in the conventional sense. It sits in ordinary farmland near a townland boundary, in ground that drains poorly enough to have left a slight depression or pooling visible from satellite imagery. For anyone interested in how archaeology actually works at its quietest and most provisional end, that wet hollow is the thing to look for, a faint signature in reclaimed ground that has outlasted, just barely, the monument it may once have marked.