What gives it away is the crop itself: a subtle difference in the colour and growth of the plants overhead, caused by the buried remains of a fosse, the encircling ditch that once defined the boundary of the site. These cropmarks appear only under the right conditions, when differential soil moisture or crop stress betrays what lies beneath, and in this case they were picked up on satellite imagery.

The enclosure measures roughly 35 metres in diameter, a scale broadly consistent with the ringforts found across Ireland, though without excavation it is impossible to say what period it belongs to or what it enclosed. It was identified and reported by Jean-Charles Caillère, working from aerial and satellite sources rather than any physical investigation on the ground. A second, smaller enclosure lies approximately 40 metres to the north-north-west, also visible only as a cropmark, the two sites sitting in quiet proximity in the same agricultural field. The fact that neither has left any surface trace whatsoever makes them something of a study in how much the Irish landscape conceals beneath its working surface.