This one in Garrynalyna, County Limerick, does none of that. It exists, at least as far as current evidence goes, only as a circular shadow in a field, visible from the air on a single set of photographs taken on 3 November 1984. There is nothing to see at ground level, no hump in the pasture, no ring of stones, no obvious break in the grass. The site was not recorded on any historic Ordnance Survey Ireland maps, meaning it slipped entirely through the documentary net for well over a century.

The feature was identified as a possible ditch-barrow from aerial photographs taken during survey work for the Bórd Gáis Éireann Curraleigh West-Limerick gas pipeline. A ditch-barrow is a type of prehistoric funerary monument, typically a low circular mound surrounded by a shallow encircling ditch, which in many Irish examples has long since been ploughed or eroded flat. What the 1984 photographs captured was a cropmark, a phenomenon where buried features such as ditches or banks subtly affect the growth of surface vegetation, producing differences in colour or height that become legible from altitude, particularly in dry summers or at low sun angles. The circular cropmark here is cut across at its southern edge by a field boundary running east to west, suggesting the modern agricultural landscape has partially dismantled whatever arrangement once existed. The site lies roughly 105 metres west of the townland boundary with Knockaunacurragha. By the time satellite imagery was available, between 2011 and 2013 on Digital Globe and on later Google Earth captures, no trace of the feature was discernible at all.

For anyone visiting, there is a candid note of caution: the record is explicit that no surface remains are visible, and the site sits in private pasture. The interest here is less in what you might see standing in the field and more in what the archive reveals about how prehistory survives, or fails to survive, in the Irish countryside. The relevant aerial photograph is referenced as BGE 1/10,560; 0119, and the record was compiled by Fiona Rooney and uploaded to the national record in November 2021. As cropmark sites go, this one is a particularly quiet case, known from a single aerial pass nearly four decades ago, and essentially invisible since.