On the western bank of a small tributary of the Gaddagh river in Coolroe, County Kerry, nineteenth-century Ordnance Survey cartographers recorded a subcircular enclosure, the kind of roughly circular earthwork boundary that was once a common feature of the Irish rural landscape. Today, no surface remains survive. The enclosure exists only as a mark on an old map.

Enclosures of this type, sometimes associated with early medieval settlement and farming activity, were built from raised earthen banks or stone walls and served as boundaries for farmsteads or livestock. They were never especially durable, and centuries of agricultural use, drainage work, and land clearance have erased many of them entirely. The first edition of the Ordnance Survey, produced in Ireland during the 1820s and 1830s, captured features that were already beginning to disappear, making it an inadvertent record of a vanishing landscape. The Coolroe site, catalogued as part of an archaeological survey of the Iveragh peninsula published by Cork University Press in 1996, represents exactly that category of place, noted before it was fully gone, then gone before many people thought to look.