This one in Ballymacushin, County Wexford, exists almost entirely as a ghost. At ground level, standing in the pasture where it lies, there is nothing to see. The only evidence of its presence comes from the air, where aerial photography has captured a faint cropmark tracing a circular area of roughly 30 metres in diameter, the outline of a fosse or ditch just barely legible in the soil.

A rath is an early medieval enclosed farmstead, typically defined by one or more earthen banks and ditches, and the type is extraordinarily common across Ireland, with tens of thousands recorded. What makes this particular example quietly interesting is how thoroughly it has retreated from visibility. The cropmark emerges because buried ditches retain moisture differently from the surrounding soil, causing the vegetation above them to grow at a slightly different rate, a difference invisible to a person walking the field but detectable from altitude. The surrounding field system appears to be connected to the perimeter of this enclosure, suggesting the wider agricultural landscape may have been laid out in relation to it. A related rath sits approximately 200 metres to the west, hinting that this corner of Wexford once held a cluster of enclosed settlements whose organisation is now only partially recoverable.