The enclosure at Cronyhorn in County Wicklow does the opposite: it has essentially vanished from the surface, surviving only as a ghost on paper and, presumably, as buried archaeology beneath the soil. What we know is that it was once a circular enclosure roughly 45 metres in diameter, large enough to have enclosed a farmstead or a defended settlement, yet today it leaves no visible trace at ground level.

The earliest modern record of the site comes from the Ordnance Survey's six-inch map of 1838, which captured it as a clearly defined circular feature. Circular enclosures of this kind are common across Ireland, typically associated with the early medieval period, when a ringfort, as they are often called, served as both a farmstead boundary and a marker of status for a family or small community. The surrounding terrain at Cronyhorn is described as level ground within gently undulating countryside, the sort of setting that would have suited a modest agricultural enclosure rather than a hilltop stronghold. That the feature was still legible enough in the 1830s to be recorded by the surveyors, yet has since disappeared entirely from the landscape, suggests gradual levelling over the intervening decades, most likely through continued agricultural activity.