On a gentle north-east-facing slope in Carrowclough, County Waterford, a low grass-covered mound traces out a rough circle that most walkers would pass without a second glance. What they would be missing is a rath, an early medieval ringfort, the earthwork remains of an enclosed farmstead probably dating to somewhere between the fifth and twelfth centuries. The interior sits slightly dished, as though the ground has settled inward over centuries, and the defining bank, spread to between seven and eight and a half metres wide but rising no more than sixty centimetres at its highest, is so low and broad that it reads less as a wall than as a gentle thickening of the hillside.

Ringforts of this type were the most common form of rural settlement in early medieval Ireland, built in their tens of thousands as defended homesteads for farming families. A typical rath would have had a single earthen bank, sometimes topped with a timber palisade, enclosing a space used for livestock and domestic buildings. Here in Carrowclough, the enclosure measures roughly thirty-nine metres north to south and thirty-five metres east to west, placing it within the mid-range of known examples. There is no surviving fosse, the external ditch that would usually accompany such a bank, though one may once have existed and simply silted or eroded away over time. The entrance, about four and a half metres wide, can be picked out as a slight dip in the perimeter on the north-east side, oriented to face the slope's own natural aspect. The site was faint but legible enough to be recorded on the Ordnance Survey six-inch map of 1840, where it appears as a ghostly circular mark, which is itself a small piece of cartographic history.