That absence alone makes it curious: generations of meticulous cartographers passed over this patch of wet pasture at Garryncahera without marking anything of significance, yet something was there all along, waiting for the right angle of light, or the right lens, to make itself known.

The site came to attention through an aerial photographic survey centred on the Bruff area in 1986, which identified it as an enclosure and catalogued it as Bruff 135. Aerial survey of this kind works by capturing landscapes from above, revealing patterns in the ground that are invisible at eye level, particularly where earthworks survive as low, eroded features. What the survey found at Garryncahera was a sub-rectangular shape, measuring approximately 12.5 metres north to south and 21.5 metres east to west, defined by a fosse, which is a ditch or trench dug around an enclosed area, often as part of a defensive or boundary arrangement. Later orthophotography taken by Ordnance Survey Ireland between 2005 and 2012 confirmed this outline. A Google Earth image dated September 2020 added another layer of detail, showing the feature as a semi-circular cropmark, the kind of discolouration in vegetation or soil that betrays buried or disturbed ground beneath, though by that point a field boundary running northwest to southeast had cut across the southern edge of the monument. The record was compiled by Martin Fitzpatrick and uploaded in April 2021.

The enclosure sits in wet pasture immediately north of that field boundary, and the waterlogged ground is probably part of why it survived at all, even in this diminished form. There is no public monument or signage here, and the site is on private farmland, so any visit would require landowner permission. Its true character is best appreciated not on the ground but through the aerial images held in the survey record, where the geometry of the fosse becomes legible and the long invisibility of the place suddenly makes a different kind of sense.