This one does none of those things. Near Grange in County Wexford, a ringfort of roughly 35 metres in diameter sits on a level stretch of farmland and is, for all practical purposes, invisible to anyone standing in it. The only clear evidence of its existence comes from the air, where aerial photography has revealed a cropmark, a subtle variation in plant growth caused by the buried remains of a fosse, the encircling ditch that once defined the outer boundary of an early medieval farmstead. In a root crop, the outline simply disappears.

A rath, as these enclosed farmsteads are commonly known, was the standard form of rural settlement in early medieval Ireland, typically dating from somewhere between the sixth and twelfth centuries. They were built by farming families rather than kings or chieftains, and thousands of them survive across the country in varying states of preservation. What makes this particular example quietly interesting is its near-total erasure from the landscape, combined with the fact that it does not stand alone. Three further rath sites have been recorded within 150 to 200 metres to the north-east and south-east, suggesting that this flat corner of Wexford once supported a small cluster of contemporary or successive farmsteads. The circular enclosure here connects on its southern side with an east-west cropmark feature that may represent a drain, hinting at the practical management of what would have been working agricultural land.