Known historically as Knockaunconneely fort, this early medieval enclosure, a type of circular earthwork typically used as a farmstead or defended homestead during the first millennium, was already being quietly erased long before anyone thought to look closely at the ground.

The 1840 Ordnance Survey map recorded it clearly: a roughly circular embanked enclosure approximately forty metres in diameter, bisected east to west by a public road. That road was the beginning of the end. By the time the 1923 OS six-inch map was produced, only the northern arc of the bank was still worth depicting, the southern half having been consumed or levelled by road improvements and the gradual movement of traffic and land use across the site. What remained on the 1923 map was a fragmentary curve, a possible fosse alongside it, and an outer scarp immediately north-west of the road, faint traces of what had once been a coherent defensive circuit. When the site was later inspected in person, as recorded by Denis Power and uploaded to the archaeological record in June 2013, there was no evident trace of the monument at all. The fort had not so much collapsed as simply been absorbed into the working landscape around it.

The slope itself still commands good views to the north, west, and east, which likely explains why the site was chosen in the first place; elevated positions with wide sightlines were typical for ringforts of this kind. A visitor coming here would find little to reward a dedicated search of the ground. The road that bisected the enclosure still runs through the area, and the northern slope retains its angle and aspect, but the earthworks that once defined this place are gone. What makes it worth knowing about is less the monument itself than the particular way it disappeared, incrementally, map by map, until only the cartographic record preserved any memory of its shape.