This one in Coole, County Carlow, does the opposite. It survives only as a mark on a map, a circular enclosure roughly 35 metres across, recorded on the Ordnance Survey six-inch sheet of 1908 and, by all accounts, gone from the landscape entirely since then.

The 1908 mapping shows the enclosure defined by a bank, indicated through hachures, the short lines surveyors used to suggest the slope and direction of raised ground. That the cartographers recorded it at all suggests it was still legible in the field at the turn of the twentieth century, at least faintly. Circular enclosures of this kind are generally understood to be ringforts, the most common type of early medieval settlement monument in Ireland, typically dating from roughly the sixth to the twelfth centuries. They served as enclosed farmsteads, the bank and sometimes an outer ditch providing a degree of security for a family and their livestock. At around 35 metres in diameter, this example would have been on the modest end of the scale. At some point between its mapping in 1908 and more recent survey work, whatever remained of the bank was levelled, most likely through agricultural improvement, leaving no visible surface traces.

There is nothing to see at this site today. Its interest lies less in what it offers a visitor and more in what its disappearance represents: a category of loss so common across the Irish countryside that it barely registers. Thousands of ringforts have been erased from the landscape over the past century, and this one in Carlow, reduced now to a footnote and a set of hachures on an old map, is among them.