On a broad hilltop in Kilmovee, County Waterford, there is a circular enclosure roughly forty metres in diameter that you would walk straight across without knowing it. The earthwork is invisible at ground level, its banks long since reduced to nothing a casual eye can read. What makes it knowable at all is a single source: the 1840 edition of the Ordnance Survey six-inch map, which recorded the outline clearly enough that archaeologists have been able to assign it a classification and a grid reference, even if the ground itself offers no confirmation.

The structure is recorded as an embanked enclosure, a broad category that covers a range of prehistoric and early medieval earthworks defined by a raised bank, sometimes accompanied by a ditch, encircling a roughly circular area. Whether this particular example was a domestic settlement, a place of assembly, or something with a ritual function is not known. What the hilltop position does suggest is that the site was deliberately placed in a commanding location, a choice consistent with many Irish enclosures of the early medieval period. Adding a degree of interest to the wider landscape is a possible ringfort roughly two hundred metres to the north-east. A ringfort, to give the shorthand, is a farmstead enclosure of the early medieval period, typically defined by one or more earthen banks. Whether the two sites were ever contemporary, or connected in any practical sense, is an open question.