This one in Garryellen, County Limerick, does almost the opposite. It exists, as far as anyone can tell, as a faint circular shadow pressed into the earth, visible only under the right atmospheric conditions, from the right angle, on the right photograph. It does not appear on any Ordnance Survey historic maps, and by the time surveyors from the Archaeological Survey of Ireland visited in 2000, they recorded no surface remains whatsoever. The monument is, in the most literal sense, nearly gone.

A ring-barrow is a burial mound of prehistoric origin, typically consisting of a low central mound enclosed by a circular ditch and sometimes an outer bank. This example came to light not through ground investigation but through aerial photography. During the Bruff aerial photographic survey of 1986, the site was identified as a small circular cropmark, a type of feature that appears in growing crops or pasture when buried ditches or soil disturbances affect how vegetation grows above them, making ancient features briefly legible from the air. The survey image, referenced as Bruff 7902: AP4/3071, captured this outline at a moment when conditions conspired to make it visible. Subsequent imagery has been less obliging. An Ordnance Survey orthoimage taken between 2005 and 2012 shows a faint outline of a possible monument, and a Digital Globe photograph from March 2017 carries what is described as a barely visible circular feature. Other satellite images show nothing at all. A second ring-barrow, a separately recorded monument, sits approximately 65 metres to the south, on the same gently west-facing slope that rolls through undulating pasture near the townland boundary with Kilderry.

There is no marked path to this site and nothing to orient a visitor on arrival. The field in question is private farmland, and the monument itself offers no visual reward at ground level. What makes it worth knowing about is precisely that absence: this is archaeology that exists almost entirely in archives, in a 1986 aerial photograph and a handful of satellite images where you have to look carefully to find even the suggestion of a circle. The record was compiled by Alison McQueen and Vera Rahilly and uploaded to the national monuments database in August 2020. For anyone interested in how the past is documented as much as how it is preserved, the Garryellen ring-barrow is an instructive case of a monument that survives, just barely, as information rather than as landscape.