There is nothing to see at surface level, no earthwork, no ridge, no obvious interruption in the soil. The only way the feature has ever been observed is from the air, where the buried ditch of a ring-ditch shows itself as a cropmark, the grass or grain above the filled ditch growing at a subtly different rate from the surrounding field, tracing a perfect circle against the level ground.

Ring-ditches are the ploughed-flat remains of prehistoric burial or ceremonial monuments, most often Bronze Age round barrows whose central mound has long since been levelled by centuries of agriculture. What survives underground is the circular ditch that once surrounded the mound, and it is this that occasionally surfaces as a cropmark in dry summers when aerial photography can catch the differential in vegetation. The Wexford example sits on fairly level ground, which would have made it well suited to the original construction of such a monument and, incidentally, well suited to the agriculture that eventually erased it.