At Clasheel in County Cork, a ringfort once sat in open pasture, a circular earthen enclosure roughly forty metres across. Ringforts, known in Irish as raths, were the most common form of rural settlement in early medieval Ireland, typically consisting of a raised bank and ditch enclosing a homestead. This one has been entirely erased, levelled around 1979, leaving no visible surface trace whatsoever.

The site appears clearly on the Ordnance Survey six-inch map of 1842, marked as a neat circular enclosure. By the time the same area was surveyed again in 1903, and once more in 1935, something had already begun to intrude: a field fence running roughly north-east to south-west had clipped the enclosure along its north-north-western edge, truncating what had previously been a complete circle. That boundary line, drawn to divide one patch of farmland from another, quietly began the process of erasure long before the final levelling. What the maps record, in their measured and unsentimental way, is a structure that survived perhaps a thousand years of Irish agriculture, only to disappear within living memory.