This one in Ballinvana, County Limerick, does no such thing. It exists, in any practical sense, only in a single aerial photograph taken on 3 November 1984, when a camera mounted above a Bórd Gáis Éireann survey flight caught a faint circular mark pressed into the ground below. On the surface today, there is nothing to see at all.

The photograph was taken as part of aerial survey work carried out at a scale of 1:5,000 for the BGE gas pipeline project. Analysts examining those images identified the circular feature as a probable ditch barrow, which is a prehistoric burial monument defined not by an upstanding mound but by a surrounding circular ditch, usually cut into the earth and sometimes accompanied by an outer bank. What made the Ballinvana feature legible from the air was likely a combination of soil moisture and crop or grass variation, the kind of ghostly patterning that shows up under particular lighting and weather conditions and then disappears again. The site sits in reclaimed wet pasture roughly 200 metres south-west of the Morningstar River, which marks the townland boundary with Elton. It does not appear on any Ordnance Survey Ireland historic maps, suggesting it was either missed by earlier surveyors or had already become invisible at ground level by the time those maps were drawn. It is thought to be one of six possible barrows within the south-west quadrant of what may be a wider ancient field system, though the evidence for that broader landscape context is similarly subtle.

By the time Digital Globe orthoimagery was captured between 2011 and 2013, and in subsequent Google Earth imagery, no surface trace of the feature remained detectable. A visitor to Ballinvana today would find ordinary farmland, the kind of low, damp pasture common to this part of Limerick, with the Morningstar River quietly marking the boundary to the north-east. There is nothing to stand beside or photograph. The value of the site lies entirely in what it represents about how archaeology is now found, not through excavation or chance discovery, but through the patient reading of photographs taken decades ago for entirely unrelated purposes, images that turned out to contain the outline of something far older than a gas pipeline.