Walk across the pasture and you would notice almost nothing: a faint undulation along the north-eastern arc, a patch of rush-choked, waterlogged ground occupying much of the eastern interior. The enclosure does not appear on any edition of the Ordnance Survey six-inch maps, the standard reference for features of this kind across Ireland. It was only through LiDAR imagery, a remote-sensing technique that uses laser pulses to detect subtle variations in ground surface invisible to the naked eye, and aerial photography, that the site was identified at all.

The enclosure sits on the ridge at Annaghcor, positioned some twenty-five to thirty metres west of a break of slope where the ground drops sharply away to the north-east and east into a valley below. Circular enclosures of this general type are common enough in the Irish landscape; they range in origin from early medieval ringforts, which served as farmsteads enclosed by an earthen bank, to prehistoric ceremonial sites, and various agricultural or defensive functions in between. What makes this particular example unusual is that the date and purpose of its construction remain entirely unknown. It was levelled at some point in the past, the bank flattened and the ditches filled, leaving only that slight topographic memory in the ground. The damp hollow at its centre, where rush and standing water have colonised the eastern half of the interior, may reflect the persistence of a filled ditch or some earlier disturbance of drainage. An ESB electricity pole now stands close to the north-western edge, a mundane marker of the site's modern invisibility.