Others survive only as shadows, legible not to the eye on the ground but to a camera looking down from above. The ringfort at Ballybeg Small, in County Wexford, belongs firmly to the second category. What was once a substantial enclosed settlement has been reduced, over centuries of cultivation, to a cropmark, a phenomenon where buried features influence the growth of surface vegetation just enough to betray their outlines when viewed from the air.

Aerial photographs reveal a circular enclosure roughly 25 to 30 metres in diameter, defined by a single fosse, the term for a rock-cut or earth-cut ditch that would originally have ringed the interior. A gap on the northern side marks what was almost certainly the original entrance. This type of enclosure is known as a rath, a farmstead form that was widespread across early medieval Ireland, typically from around the fifth to the twelfth centuries. The site sits on a rise within an undulating landscape, a positioning that would have offered both drainage and a degree of visibility to its original occupants. The fosse alone, without any visible accompanying bank, suggests that the upstanding elements of the earthwork have long since been levelled, leaving only the cut into the subsoil to register in the crops above it.