A circular enclosure, roughly 27 metres in diameter, once occupied this ground. By the time a field investigator named Cahill visited in 1982, it had been levelled completely; there is nothing to see at ground level today.

What makes the site quietly compelling is the way it slipped out of the historical record in stages. The first edition Ordnance Survey six-inch map, produced in 1840, shows it clearly as a circular enclosure, with a townland boundary running roughly east to west along its southern edge. By the time the second edition was surveyed in 1903 and 1904, the enclosure itself had vanished from the cartography, yet the mapmakers could not quite erase all trace of it. A slight kink in the townland boundary line, bending almost imperceptibly where the southern bank of the enclosure once stood, betrays something that was already gone from view but had not been entirely forgotten by the landscape. Enclosures of this type, typically defined by an earthen bank and sometimes a ditch, were a common feature of early medieval Ireland, used variously as farmsteads, places of habitation, or occasionally for the management of livestock. Two further enclosures survive in the same area, one approximately 300 metres to the north-east and another roughly 250 metres to the south-west, suggesting this part of Knockkelly was once considerably more structured and inhabited than its current state of smooth pasture implies.

The kink in the townland boundary is the only above-ground evidence that anything was ever here. It is the cartographic equivalent of a scar, present not because anyone preserved it deliberately, but because administrative lines, once drawn, tend to hold their shape even when the features that prompted them have long since been ploughed away.