This one, on a north-facing slope of a small knoll in the townland of Raheen in County Limerick's Coshma Barony, does something more unsettling: it appears and disappears depending entirely on how you look at it. Visible from the air under the right conditions, it vanishes again when examined on satellite imagery taken just years later. It has never been recorded on Ordnance Survey historic maps, and repeated checks of orthoimages, including those from OSi taken between 2005 and 2012, Digital Globe imagery from 2011 to 2013, and Google Earth captures from March 2016 and June 2018, have all drawn a blank. The enclosure exists, officially, because a single aerial photographic survey caught it.

That survey was the Bruff aerial photographic programme of 1986, which logged the site under reference Bruff 71, aerial photograph AP 4/3601. An enclosure, in this archaeological context, refers broadly to a defined area bounded by earthworks, a ditch, or a bank, the function of which can range from settlement to ritual to agricultural use depending on the period and the evidence. This one sits 1.9 kilometres west of Lough Gur, one of Ireland's most archaeologically dense lake landscapes, where human activity stretches back thousands of years. The immediate surroundings reinforce the sense that something deliberate was once happening here. A ringfort, a type of enclosed farmstead characteristic of early medieval Ireland, lies 100 metres to the north-east. A prehistoric burial site sits just 90 metres to the east-north-east. Whatever this enclosure was, it was not placed in isolation.

The site lies 15 metres north of the townland boundary with Rockbarton, on gently sloping ground that offers little drama on foot. Because the earthworks are not currently visible on any available satellite or aerial imagery, there is nothing obvious to orient a visitor standing in the field. The Bruff survey image, referenced in the National Monuments record compiled by Edmond O'Donovan and uploaded in October 2020, remains the most concrete evidence of the feature's form. Anyone with a serious interest would be better served by consulting that record and the associated aerial photograph before visiting, rather than expecting the ground to speak for itself.