The field at Moanmore in County Tipperary looks like any other stretch of improved pasture, gently rolling, unremarkable. Yet somewhere beneath the grass lies the ghost of a circular enclosure roughly eight metres across, a ring-ditch that has never appeared on any edition of the Ordnance Survey six-inch maps and that leaves no surface trace whatsoever. The only evidence of its existence is a single aerial photograph, catalogue reference OSI 5/2090, in which the outline of the feature becomes readable from above as a faint, roughly circular mark pressed into the earth.

A ring-ditch is typically the ploughed-down or eroded remnant of a burial monument, the circular trench that once defined a barrow or mound now reduced, over centuries of agriculture, to little more than a soil mark. What makes the Moanmore example quietly interesting is its setting. It sits within a small cluster of related features: two enclosures lie around fifty metres to the north-west, and a barrow has been recorded approximately twenty-five metres to the south-east. The ring-ditch, in other words, was not an isolated feature but part of a wider prehistoric landscape, now almost entirely absorbed into ordinary farmland. That none of it registered on nineteenth-century mapping suggests the traces were already faint by the time surveyors walked the ground, surviving only in the soil itself, legible solely to a camera carried aloft.