Some archaeological sites announce themselves with broken stonework or a dramatic silhouette on the skyline. The ringfort at Ballynabanoge does neither. Sitting in ordinary pasture on the south-facing slope of a small west-to-east valley in County Waterford, it is, by all accounts, invisible at ground level. No earthwork rises to catch the eye, no hollow betrays the line of a bank. The site exists, for the practical purposes of anyone standing in the field, almost entirely as a cartographic fact.

A ringfort, in general terms, is a roughly circular enclosure defined by one or more earthen banks and ditches, used primarily as a farmstead during the early medieval period in Ireland. This particular example is oval rather than circular, measuring approximately 55 metres east to west and 45 metres north to south, making it a fairly substantial enclosure. What is telling, though, is that it appears on only one edition of the Ordnance Survey six-inch map, that of 1925. Whatever earthwork was legible to a surveyor a century ago has since flattened to the point where it leaves no impression on the surface. Centuries of agriculture, and particularly the sustained pressure of grazing animals on a sloped field, are efficient levellers of low earthen features.