It has no surface expression, meaning there is nothing to see from the ground at all. Its existence was first suspected not from fieldwork but from a desk, when archaeologist Celie O'Rahilly spotted its outline in aerial photographs taken by Ordnance Survey Ireland in September 1985. The images showed the faint crop-mark signature of an oval ditch, the kind of boundary that might once have defined a settlement, a ritual space, or a field system. What that enclosure actually was, and how old it might be, remains genuinely unknown.

The site's story since its identification has been one of near-misses and gradual recovery. When road construction began on the ring road, there was real concern that the enclosure had been destroyed before it could be properly investigated. Test excavations carried out in 2005 by Cia McConway and Niall Gregory failed entirely to locate the enclosure ditch, though they did uncover other features in the north-west quadrant of the field, including what appeared to be a fulacht fiadh, the term for a type of ancient burnt mound associated with cooking or industrial activity, and a possible corn-drying kiln. It was only in 2017 that archaeologist Red Tobin, working under a separate licence, finally confirmed the enclosure's precise position, finding the ditch in five out of six test trenches. His survey established the monument's dimensions at roughly 50 metres north to south and just under 34 metres east to west. The 2005 features, it turned out, had all been located inside the enclosure all along, and were reinterpreted as activity associated with it. A geophysical survey conducted as part of the same assessment failed to detect the enclosure at all, a reminder that even modern prospection methods do not always find what is there.

There is very little for a visitor to observe on the ground. The site sits in private agricultural land adjacent to the Annacotty roundabout, where the R445 and L1165 meet, and there is no public access or interpretive signage. The enclosure is entirely subsurface, its ditch filled and its interior visible only in excavation trench sections. What makes this place worth knowing about is precisely that invisibility: a monument of unknown age, detected first from the air, nearly written off as destroyed, and quietly confirmed by a trowel in a trench beside a motorway junction.