This one in Caherline, County Limerick, does neither. The barrow here exists, to all practical purposes, as an absence. It cannot be seen on the ground, it does not appear on Ordnance Survey historic maps, and by the time satellite imagery was capturing the area between 2011 and 2018, there was nothing left to detect at all. What we know of it comes from a single moment in 1986, when an aerial survey caught the faint geometry of the past impressed into a crop.

A ring barrow is a burial monument, typically a low circular or oval earthen mound enclosed by a ditch and sometimes an outer bank, dating in Irish contexts to the Bronze Age or early Iron Age. The example at Caherline, catalogued as LI023-180001-, was identified as a roughly oval-shaped cropmark during the Bruff aerial photographic survey of 1986, recorded under reference Bruff 244, AP 4/3689. Cropmarks of this kind appear when buried features such as ditches retain more moisture than the surrounding soil, causing the vegetation above them to grow differently, a difference invisible at ground level but legible from the air under the right conditions. The surrounding landscape works against preservation here: the site sits on low-lying wet pasture, shaped by flood waters and cut through by land drains and watercourses, the kind of active, churned ground that does not favour the survival of subtle earthworks. A second ring barrow lies approximately 45 metres to the north, suggesting this was once a more populated ritual or funerary landscape, even if little of it now survives in any visible form.

For anyone visiting the area, expectations should be modest and realistic. There is nothing to see at the site itself, and the monument is not depicted on historic Ordnance Survey maps, which means conventional map-reading offers no assistance in locating it precisely. The value of the place is more archival than experiential: it represents the kind of record that exists only because an aircraft passed overhead at the right moment, in the right season, when a crop happened to betray what lay beneath. The compiled record, prepared by Alison McQueen and Vera Rahilly and uploaded in August 2020, preserves that 1986 image as the primary evidence. Anyone with a serious interest would do better to start there, with the aerial photograph, than with a visit to a field that has, for now, closed over its past entirely.