What looks from above like a prehistoric enclosure, the kind of circular earthwork that punctuates the Irish landscape in their thousands, can turn out, on closer inspection, to be something considerably more mundane. That is precisely what happened at Ballyconry in County Clare, where a circular feature spotted in Air Corps imagery spent years catalogued as a potential archaeological site before someone actually walked out to look at it.

The site appeared in both the Sites and Monuments Record of 1992 and the Record of Monuments and Places in 1996, listed cautiously as a potential enclosure identified from aerial photography alone. When an inspection was carried out in 1997, the feature resolved itself into a disused circular field roughly thirty metres in diameter, its boundary formed by a single wall of large stone blocks set on edge. The construction style and context suggest a date after 1700, placing it firmly outside the prehistoric or early medieval periods that aerial survey teams are typically hoping to find. The north-facing slope it sits on, amid rough grazing land and outcrops of bare rock, is the kind of ground that in Clare often holds genuine antiquities, which is presumably why the photograph warranted a closer look in the first place.

There is something quietly instructive about this place. Enclosures, in the archaeological sense, are among the most common site types in Ireland, ranging from the elaborate ringforts of the early medieval period to simple livestock pounds of the post-medieval era. The difficulty is that from altitude they can look nearly identical, and the only way to tell them apart is to go and see. Ballyconry ended up as a footnote in that process, a site that turned out not to be a site, preserved in the record as a small monument to the limits of remote observation.