Beneath the flat pasture, the faint outline of an ancient enclosure survives as a series of subtle undulations, the kind of unevenness that most walkers would dismiss without a second thought. What makes this site particularly curious is not what remains of it, but how little, and how quickly even that little is disappearing.

The enclosure was first identified during the Bruff aerial photographic survey of 1986, when photographs taken at oblique angles revealed two sides of a sub-rectangular enclosure with external dimensions of approximately 35 metres east to west and 65 metres north to south. Aerial photography has long been one of the most effective tools for identifying buried or near-surface archaeological features, since crop marks and shadow differences invisible at ground level can become legible from the air. Despite this aerial identification, the site never appeared on Ordnance Survey Ireland historic maps, meaning it left no cartographic trace across centuries of systematic surveying. Its neighbours tell a different story about the wider landscape: a moated site, the kind of defended manor enclosure associated with medieval settlement, lies 360 metres to the east, and a ring-barrow, a low circular burial mound of probable prehistoric origin, sits just 60 metres to the north-north-east. The enclosure compiled by Edmond O'Donovan and uploaded to the record in October 2020 sits 290 metres south of the townland boundary with Glenogra, quietly surrounded by monuments of quite different periods.

What makes the Coolfune enclosure an unusual case is its gradual erasure from the visible record. It appeared as uneven ground on Ordnance Survey Ireland orthoimages taken between 2005 and 2012, and the north boundary was still discernible on the earliest available Google Earth imagery from April 2006. By the time Digital Globe captured the same ground between 2011 and 2013, it had already become invisible, and a Google Earth image from June 2018 confirms it has left no surface trace. For anyone visiting the site, there is nothing to see in the conventional sense. The value lies in knowing what the ground once held and understanding how agricultural activity can, over a matter of years, effectively erase the surface expression of a feature that survived, however faintly, for centuries.