This oval earthwork in reclaimed pasture near Ballincurra Stream, on the southern edge of the townland boundary with Fantstown in County Limerick, followed exactly that trajectory. For a time, it looked every bit like a genuine enclosure, the kind of feature that dots the Irish countryside and speaks to centuries of human settlement. The reality, it turns out, is considerably more interesting in its own way.

The feature was first identified as a possible enclosure from an oblique aerial photograph taken on 5 January 2003, the sort of bird's-eye perspective that regularly reveals cropmarks and earthworks invisible at ground level. At that stage it appeared promising: an oval shape roughly 16 metres on its northeast to southwest axis and 10 metres across, defined by what seemed to be a boundary feature. It did not appear on the Ordnance Survey Ireland historic six-inch maps, which might have suggested it was either very old or very subtle. Later examination of a Digital Globe orthoimage taken between 2011 and 2013 showed the oval still legible, but now it was being read differently, as a dried-up watercourse rather than a constructed boundary. By the time Google Earth imagery was reviewed on 4 January 2021, no surface remains were visible at all. The surrounding field had resolved into a pattern of meandering dried-up watercourses and drainage ditches. Researcher Martin Fitzpatrick, who compiled the record uploaded in September 2021, concluded that the curving earthwork was most likely the product of paleochannels, ancient river channels that have shifted or dried over time, rather than any deliberate human construction. A related earthwork, recorded separately, lies 130 metres to the south.

Paleochannels are the ghost traces of former watercourses, left behind as rivers migrate across floodplains over centuries or millennia. They can mimic the curving lines of man-made enclosures with enough fidelity to fool even experienced aerial interpreters, particularly when viewed from a single angle or in a single season. There is nothing to see at ground level here, and the site sits on private reclaimed pasture. Its value is less as a destination than as a reminder of how provisional archaeological identification can be, and how the same patch of ground can read entirely differently depending on the technology, the season, and the angle of the light.