This one, in the townland of Gibbonstown in County Limerick, barely announces itself at all. What may be a prehistoric ditch-barrow, a circular funerary monument defined by a surrounding ditch rather than a raised mound, survives here only as a ghost in aerial photography. By the time satellites were producing detailed ground imagery in the early 2010s, no surface trace remained visible whatsoever. The monument had, to all practical purposes, been erased from the landscape.

The site sits in reclaimed pasture, roughly 110 metres north of a stream marking the townland boundary with Fantstown and about 100 metres south of a railway line. It belongs to a cluster of up to six possible barrows concentrated within an area of approximately 175 by 100 metres in the southern part of the townland, a density that hints at a prehistoric burial ground of some local significance. None of these monuments appear on the Ordnance Survey Ireland historic six-inch maps, suggesting they were already so faded by the nineteenth century as to leave no impression on the surveyors of the time. The site was first identified as a possible barrow from an oblique aerial photograph taken on the 5th of January 2003, in which the monument is intersected on its western side by a field boundary running northwest to southeast. A Google Earth orthoimage from April 2006 captured a faint circular outline, with a diameter of around seven metres, consistent with a ditch-barrow. The record was compiled by Martin Fitzpatrick and uploaded to the national monuments database in September 2021.

There is nothing to see on the ground. The field boundary that cuts across the monument's western edge is probably the most tangible marker of where the site lies, and even that is only meaningful if you already know what you are looking for. The interest here is less in visiting and more in the strange archaeology of absence itself: the way that a careful reading of aerial images, taken across different years and seasons, can recover outlines that pasture management and ploughing have otherwise completely consumed. For anyone curious about how such sites are recorded in Ireland, the National Monuments Service's online database holds the orthoimages that make the faint ditch ring briefly legible again.