At Coolowen in County Cork, a large rectangular enclosure, measuring roughly 80 metres on its longer axis and 60 metres across, sits atop a low rise in pasture land, with no visible trace remaining on the ground. The surrounding field fences have been removed, which means the land reads as open and unremarkable. Nothing announces that anything was ever here.

What we know comes from the Ordnance Survey's six-inch map of 1842, which records not only the main rectangular enclosure, oriented roughly northwest to southeast, but also a smaller D-shaped annexe attached at its southeastern end. Annexes of this kind are sometimes associated with enclosures that served agricultural or settlement functions, the secondary space used for penning animals or as a separated working area. Immediately to the east, the remains of a ringfort have been recorded as a separate feature. A ringfort, to use the most familiar shorthand, is a circular or roughly circular enclosed farmstead of early medieval date, typically defined by an earthen bank and ditch, and thousands of them survive across Ireland in varying states of preservation. The proximity of one to this larger rectangular enclosure suggests the area was a focus of activity over a considerable period, though the precise relationship between the two features is not documented.