The earthwork at Redcow, on the south-western fringe of Dublin, asks something more radical: it asks you to accept that the site no longer exists in any accessible sense. The monument lies buried beneath the Naas dual carriageway, sealed under tarmac and traffic, invisible at ground level and unreachable by any ordinary means.

The record of this earthwork was compiled by Geraldine Stout and uploaded in August 2011, by which point the site had long since been consumed by road infrastructure. Before it disappeared from view, the earthwork occupied a gentle north-east-facing slope, the kind of modest, well-drained ground that communities across prehistoric and early medieval Ireland favoured for settlement, agriculture, and ceremonial enclosure. Earthworks as a category cover a wide range of features, from simple field boundaries and enclosures to ringforts, burial mounds, and ritual monuments, and without further survey it is difficult to say precisely what function this particular example once served. What the record preserves is the bare fact of its existence, its orientation, its topographic setting, and its fate.

Redcow is perhaps best known today as the name of a busy roundabout interchange where the M50 meets the Naas Road, one of the more relentlessly functional corners of the greater Dublin area. There is no marker, no interpretive sign, and no vantage point from which the earthwork can be observed, because there is nothing to observe. For anyone interested in how infrastructure development has shaped, and in many cases erased, the archaeological record of Irish landscapes, this is a quietly instructive case. The site is noted in the record precisely so that its loss is not forgotten entirely, a reminder that the ground beneath a dual carriageway was once, in some earlier configuration of land and time, a place where people made something that was worth marking out on the earth.