No mound rises above the grass, no stone marks the spot, and the site appears on none of the Ordnance Survey Ireland historic maps that have recorded the Irish landscape in such meticulous detail for nearly two centuries. What exists here is a prehistoric ring barrow, a type of funerary monument in which a burial or cremation deposit was typically enclosed within a circular bank and ditch, that has been so thoroughly flattened by time, waterlogging, and agricultural drainage that it can only really be read from the air.

The monument came to attention during the Bruff aerial photographic survey in 1986, when analysts identified a circular cropmark in the fields at Kilduff, catalogued as Bruff 258 (AP 4/3678). Cropmarks form when buried archaeological features, such as the filled-in ditches of ancient monuments, cause overlying vegetation to grow differently, often more vigorously or in a contrasting colour, making the buried geometry briefly legible from altitude. Later aerial orthoimage surveys taken between 2005 and 2012 by Ordnance Survey Ireland, and again on a Google Earth image from November 2018, confirmed the feature as a faint, suboval-shaped cropmark measuring approximately six metres northwest to southeast and 4.5 metres northeast to southwest. The site sits roughly 70 metres northwest of a stream that also marks the townland boundary with Garrison, in low-lying pasture cut through with land drains and watercourses. Two related ring barrows lie close by, one approximately 25 metres to the east and another around 65 metres to the north-northeast, suggesting this was once a small cluster of funerary monuments in what is now an otherwise ordinary stretch of farmland.

There is little to see on the ground, which is part of what makes the site worth understanding. The land remains under agricultural use and shows no visible surface trace of the monument. The clearest way to appreciate what is here is to examine the aerial imagery available through Google Earth or the OSi map viewer, where, under the right seasonal conditions and light, the suboval outline can still be faintly distinguished in the grass. The work of compiling and recording this site was carried out by Alison McQueen and Vera Rahilly, with the record uploaded in October 2020, part of the ongoing effort to document monuments that would otherwise remain entirely unrecognised.