In the low-lying pasture of Carrowaneeragh, on a south-east-facing slope in County Mayo, a circular enclosure once existed that local tradition remembered as a ringfort. Ringforts, broadly speaking, were enclosed farmsteads of the early medieval period, typically defined by one or more earthen banks and ditches, and they are among the most common monument types in Ireland. This one, however, has been levelled entirely. No bank, no ditch, no rise in the ground remains to suggest that anything ever stood here.

What makes the site traceable at all is the Ordnance Survey map of 1838, which recorded the enclosure clearly enough to mark it as a circular feature on the landscape. By the time any modern survey came to document it, the ground had been smoothed into ordinary pasture. The gap between the map evidence and the physical reality is itself a kind of record, capturing a moment when a feature that had survived for perhaps a thousand years was finally erased, somewhere in the century and a half between the surveyors' visit and the present day. Local tradition kept the memory of a ringfort alive even after the earthworks disappeared, which is not unusual in rural Ireland, where field names and oral knowledge often preserve what cultivation and drainage have removed from sight.