At Castledaly in County Galway, a ringfort once occupied a modest patch of scrubland, its earthen banks enclosing a roughly circular space of about 33 metres across. Ringforts, known in Irish as raths, were the most common form of rural settlement in early medieval Ireland, typically consisting of a circular area bounded by one or more banks and ditches, used to protect a farmstead and its livestock. This one has vanished almost entirely, leaving behind a landscape that looks, at first glance, like ordinary agricultural ground.

The fort was recorded on the 1838 edition of the Ordnance Survey six-inch map as a clear circular enclosure, which suggests it was still legible in the landscape at that point. By the time the 1921 edition was produced, something had already begun to change: rather than a complete outline, the cartographers drew only a curving line of hachures, the small hatched marks surveyors used to indicate a slope or bank, sweeping from the south-southwest around through west to north. That partial trace implies the earthworks were degrading even then, eroded by agriculture, grazing, or simply time. Today, no visible surface remains survive at all.

What does remain, and what gives the site a quiet interest, is the curving field boundary that now runs through this part of the scrubland. It may simply be a field boundary, but its arc appears to follow the ghost of the original enclosure, as if the memory of the old earthwork was absorbed into later land division without anyone necessarily knowing why the line bent just so. Maps, in this way, sometimes outlast the monuments they describe.