This one in County Limerick offers almost the opposite experience: a prehistoric burial monument so thoroughly absorbed into the landscape that aerial photography between 2005 and 2012 recorded no surface trace of it whatsoever. What survives is essentially a coordinate, a classification, and a question.

The site sits in reclaimed wet pasture in Tankardstown, at the north-eastern edge of a cluster of barrows, which are prehistoric burial mounds typically consisting of a raised earthen heap sometimes surrounded by a ditch or bank. A ditch barrow, as the classification here suggests, is defined primarily by that surrounding ditch rather than by any prominent above-ground mound. The wider Tankardstown group is substantial, comprising at least a dozen recorded monuments in close proximity, along with an enclosure lying roughly 95 metres to the north-east. This particular site was listed by Grogan in 1989 as 'Tankardstown 8' and identified as a possible ring-barrow, though the record compiled by Fiona Rooney and uploaded in May 2021 notes it does not appear on Ordnance Survey Ireland historic maps at all. There is an additional complication: the site may be a duplicate entry, referring to the same physical feature as a ditch barrow recorded just 10 metres to the north.

For anyone drawn to visit, the practical reality is that there is genuinely nothing to see on the ground. The land is reclaimed pasture, the kind of low-lying field that was once waterlogged and has been drained for agricultural use over generations, and the monument, if it remains physically distinct at all, lies beneath grass with no visible earthworks. The interest here is less in the experience of standing somewhere and more in what the site represents as a piece of archaeological record-keeping: the difficulty of distinguishing real gaps in the prehistoric landscape from gaps in our knowledge of it, and the slow, careful work of deciding whether two entries in a database describe one thing or two.