At Cahercorney in County Limerick, that is very nearly all that remains of an ancient enclosure, and even that ghostly outline has since faded from view.

When the archaeologist M. J. O'Kelly documented the site in 1942 and 1943, the monument had already ceased to exist in any physical sense. Writing in his survey notes, he recorded that none of the structure remained, its position indicated only by a circle of differently coloured vegetation set against the surrounding ground. That discolouration, he reasoned, marked the line of the fosse, the outer ditch that would originally have defined the enclosure's boundary. Working from a description given by a local man who had actually seen the structure standing, O'Kelly suggested it had been a platform ringfort of Type A, a classification referring to a raised, roughly circular earthen enclosure typically used for habitation or enclosure of livestock during the early medieval period. The monument measured approximately 37 metres across and sat within low-lying marshy ground, a setting that would have made it both vulnerable to waterlogging and, in its day, relatively defensible. By the time O'Kelly was writing, none of that form survived. More recently, a review of Digital Globe aerial photography confirmed that even the vegetation anomaly he described is no longer visible from above.

Cahercorney is a quiet rural townland, and there is nothing on the ground today that would signal the presence of an archaeological site to a passing visitor. The low-lying marshy terrain O'Kelly described makes the area difficult to traverse in wetter months, and the lack of any visible earthwork means there is little to orientate a visit around. What makes this place quietly significant is precisely that absence, the fact that a monument once substantial enough to leave a circular imprint on the landscape for decades after its destruction has now passed entirely out of sight. For anyone interested in the vulnerability of earthwork archaeology to agricultural change and soil conditions, Cahercorney offers a sobering illustration of how completely the record can disappear.