There is a ringfort in Ballindysert, County Waterford, that you can stand directly on top of and not know it is there. Set into a steep south-facing slope in pasture, the earthwork is invisible at ground level, which is an oddly fitting condition for a type of monument that already tends to be misread by the landscape around it. Ringforts, sometimes called raths, are circular enclosures defined by one or more earthen banks and ditches, built predominantly during the early medieval period as farmsteads or high-status residences. This one at Ballindysert measures roughly 45 to 50 metres in diameter, placing it within the typical range for such sites, though its situation on a pronounced slope gives it a character distinct from the open-field examples more commonly encountered across Irish farmland.

The enclosure was recorded on the first edition of the Ordnance Survey six-inch map, published in 1840, which means surveyors working in the early nineteenth century could distinguish its circular bank clearly enough to commit it to paper. That the earthwork has since settled or eroded to the point of invisibility from the ground speaks to how much these features can change over nearly two centuries of agricultural use, and how much of what the early OS teams captured has quietly vanished into the turf since.