This one in Walshestown, County Wexford, is visible only from the air, its presence betrayed by a subtle difference in how crops grow above buried ground. A subcircular enclosure measuring roughly 30 metres by 25 metres shows up on aerial photographs as a cropmark, the kind of faint signature left when ancient ditches, long since filled and forgotten, cause vegetation above them to ripen at a slightly different rate to the surrounding field. It is, in other words, a site that exists more clearly in photographs taken from altitude than it does to anyone standing at its edge.

The enclosure sits on low-lying, gently undulating ground, and it does not stand alone in the landscape. A rath, the Irish term for a ringfort, a type of enclosed farmstead typically dating to the early medieval period, lies approximately 130 metres to the north-north-east, and a further enclosure sits around 70 metres to the north-east. The aerial record also picks out the cropmark ditches of an old field system, one that was still considered significant enough to be mapped on the Ordnance Survey six-inch editions of both 1839 and 1940. Those field boundaries now cut through the site as single ditch features, suggesting that farming in this part of Wexford has been layering itself over earlier activity for centuries, each generation leaving its mark in the soil even as it erased what came before.