At Greenane in County Kerry, what was once catalogued as a prehistoric enclosure, the kind of circular earthwork that might reasonably suggest an early settlement or farmstead, was later identified as something far more mundane and far more Irish: a fionnán, or turf platform, ringed by a circular enclosing element. A fionnán is essentially a raised dry platform cut from the bog, used in relatively recent times for storing or working turf. The circular boundary around it may have served a practical purpose, keeping livestock away from the stacked fuel. It is the sort of structure that could fool a desk-based survey into thinking it had found something considerably older.

The site appeared in both the Sites and Monuments Record of 1990 and the Record of Monuments and Places of 1997 under the category of enclosure, a classification that implies potential archaeological significance. It was only when surveyors from the Iveragh Survey visited the ground in person that the modern origin of the feature became clear. The Iveragh Peninsula, the large southwestern finger of Kerry that includes Killarney and the Ring of Kerry, has been the subject of sustained archaeological fieldwork precisely because its landscape preserves so many genuine early monuments alongside the more ordinary features of working land. Distinguishing between the two is not always straightforward from maps or aerial photographs alone. Both the circular platform and its enclosing element are reported to survive intact.