This one in Clonmore, County Wexford, exists almost entirely as a ghost in the grass, visible not to any passing eye but only to a satellite drifting overhead. What the aerial image reveals is a cropmark, the faint differential colouring that appears in vegetation when soil beneath has been disturbed or compressed by ancient earthworks. In this case, the outline traces a roughly circular area approximately 32 metres across from north-west to south-east and around 30 metres from north-east to south-west, defined by what appears to be a slight fosse, or ditch, that once marked its boundary.

The site sits on a gentle rise along a west-facing slope, with a small stream running roughly 100 metres to the west, a detail that hints at the practical logic behind whoever chose this location. Enclosures of this general type are common enough in the Irish landscape, used across many centuries for everything from settlement and farming to ritual purposes, though without excavation it is impossible to say more about what this particular one was for or when it was in use. The cropmark itself was first identified by Simon Dowling, who spotted it on Google Earth imagery dated 14 July 2018. It is the kind of discovery that now happens regularly as aerial and satellite tools become standard instruments for survey work, revealing features that ground-level inspection would never catch.

The enclosure is not visible on the ground, and there is nothing to see in the conventional sense when standing in the field. Its interest lies precisely in that invisibility, in the fact that an entire circular enclosure, its ditch long since silted and levelled, survives only as a seasonal whisper in crop growth, legible for a few weeks each summer when conditions are right, and otherwise entirely absent from view.