No earthwork, no bank, no trace of what once stood here. Yet this absence has its own kind of interest, because the disappearance of this particular ringfort was documented as it happened, caught in the gap between a map and a photograph.

Ringforts, sometimes called raths, are roughly circular enclosures defined by earthen banks and ditches, built primarily during the early medieval period in Ireland as farmsteads or defended homesteads. The Ransborough example was a modest one, approximately thirty metres in diameter, and it appears faithfully on Ordnance Survey six-inch maps from 1842, 1905, and 1936, each time rendered as a hachured circle on the north-facing slope. By those later maps, the site had already been partially compromised: a north-south field fence cut across its western side, and a stretch of the south-eastern quadrant had been absorbed into an east-west field boundary. Local information points to around 1974 as the moment the enclosure was levelled, during a land development scheme. An aerial photograph taken in 1977 captures the situation in transition: to the west of the north-south field boundary, the enclosure was still visible; to the east, both the ringfort and the field fence that had partly defined it had already been cleared away. The surrounding field fences have since been removed as well, leaving the ground unmarked in every direction.