A ringfort that no longer exists above ground is, in one sense, an absence, but that absence carries its own kind of weight. At Ballynagappagh in County Kildare, what was once a circular earthen platform roughly seventeen metres across and about a metre high, with the remnant traces of a bank along its southern and western edges, has been ploughed back into the agricultural land from which it was originally raised, probably well over a thousand years ago.

A rath, as ringforts of this earthen type are commonly known, was typically a farmstead enclosure of the early medieval period, its bank and internal platform defining a domestic space for a family and their livestock. The Ballynagappagh example sat on a gently south-facing tillage slope and was recorded in 1985 as still partially legible on the ground. By the time that description was written down, however, the deep potato drills running east to west across the site had already done considerable damage, and subsequent cultivation has since removed whatever remained visible. Aerial photography from 1968 captured the monument before the worst of this loss. Notably, the site did not stand alone: two further enclosures lay immediately to the south-east, and a third, described as very large, sat directly to the north, suggesting that this corner of Kildare once held a dense cluster of early medieval activity.

Whether anything survives below the plough-line is uncertain, though the possibility of intact sub-surface remains has not been ruled out. The land looks like ordinary farmland now, and to most eyes passing through it would give nothing away.