On a south-west-facing slope at Ballymurphy in County Clare, aerial photography once revealed a circular enclosure, the kind of roughly ring-shaped feature that typically marks the remains of a rath or ringfort, a farmstead enclosed by an earthen bank and ditch that was common across Ireland during the early medieval period. By the time someone went to look for it in person, it had been reduced to a slight hollow in the ground.

The enclosure sits within what appears to be an extensive ancient field system, traces of which are still visible across the reclaimed land around it. A Geological Survey aerial photograph was the first to draw attention to the circular feature, and later satellite imagery from Digital Globe, captured between 2011 and 2013, confirmed that the broader pattern of the field system and possible further enclosures could still be read from above. The 1998 ground inspection found almost nothing, which tells its own story about how thoroughly the land has been worked over the centuries. Reclamation, repeated cultivation, and drainage can compress or obscure earthworks until they leave only a faint depression, the last whisper of whatever once stood there.