This enclosure at Castletown in County Tipperary does the opposite: it lies on flat pasture and is not visible at ground level at all. Its presence is known from survey work rather than anything a passing eye could catch, which makes it a peculiar kind of place, one that exists fully in the record but barely in the landscape.

An enclosure of this type would typically refer to a roughly circular or oval boundary, defined by an earthen bank and ditch, that once delimited a farmstead or settlement in early medieval Ireland. Whether this example served a domestic, agricultural, or ritual purpose is not recorded. What is noted is that it sits within a broader archaeological cluster: another enclosure site lies just to the north, suggesting that this part of Castletown was once a more populated or organised piece of ground than the quiet pasture visible today.