This enclosure in the townland of Cross, within Coonagh Barony in County Limerick, is the opposite kind entirely. It cannot be seen on the ground at all, and by the time satellite cameras swept over the area in 2011, it had apparently vanished from those images too. What we know of it comes almost entirely from a single set of aerial photographs, which caught something the landscape had otherwise quietly swallowed.

The site was identified as an oblong, rectangular-shaped enclosure from Bruff Survey aerial photographs, specifically the frame catalogued as Bruff 111: AP4/3676. Aerial survey photography of this kind, taken from low-flying aircraft under particular light conditions, can reveal cropmarks or soil variations invisible at ground level, where subtle differences in vegetation growth betray buried features beneath. The enclosure sits on a slightly raised area of north-facing slope, set within rough wet pasture. It does not appear on Ordnance Survey historic mapping at any period, suggesting it was either missed by earlier surveyors or had already lost whatever surface expression it once had. Roughly 62 metres to the west-northwest lies what is recorded as a possible ringfort, a circular earthwork enclosure of the kind built throughout Ireland during the early medieval period, typically between the fifth and twelfth centuries, and used as a farmstead or settlement. Whether the two monuments are related is not recorded. The enclosure record was compiled by Alison McQueen and Vera Rahilly and uploaded to the national database in July 2020.

By the time Digital Globe orthophotos were taken between 2011 and 2013, and again when Google Earth imagery was captured in June 2018, no trace of the enclosure was visible from the air. This is not unusual for low-lying earthworks in wet ground, where drainage, grazing, and the movement of heavy machinery over decades can reduce a feature to nothing detectable from above. The rough, wet pasture that covers the site is typical of low-lying Limerick farmland, and visiting the spot would offer little reward to anyone expecting an obvious monument. The interest here is more archival than experiential: a shape that briefly appeared in the photographic record, prompted someone to classify it, and then disappeared again into the grass.