The enclosure at Monearla, in County Limerick, does the opposite. By the time the Archaeological Survey of Ireland visited the site in 2000, there was nothing left to see at ground level. No bank, no ditch, no trace of whatever circular structure once occupied this south-facing slope. The monument had effectively erased itself from the landscape, surviving only as an entry in a record and a faint impression on aerial photography.

The site sits on a gentle slope roughly 160 metres south-east of the N21 road, in what is now open pasture. It never appeared on Ordnance Survey historic mapping, which means it slipped past the surveyors who documented the Irish countryside in the nineteenth and early twentieth centuries. Its existence came to light through aerial photography, specifically a well-defined circular feature identified on 1:4000 OSi aerial photographs, catalogued as OS3 No. 1184. Circular enclosures of this kind are broadly associated with early medieval settlement in Ireland, often taking the form of a ringfort, a type of enclosed farmstead typically defined by one or more earthen banks and ditches. Whether this was ever substantial enough to qualify as a ringfort in any meaningful sense is now difficult to say. When Digital Globe orthophotos were taken between 2011 and 2013, and again when Google Earth imagery captured the area on 28 June 2018, the feature had become invisible from the air as well.

There is, in practical terms, very little to visit here in the conventional sense. The field lies close to the N21 between Limerick and Adare, and the slope itself is in private agricultural use. What the site offers is less a physical experience than a conceptual one: a reminder that the archaeological record is full of monuments that exist only as coordinates, a confident circle on an old aerial print, and a note that reads "no surface remains visible." The research was compiled by Alison McQueen and Vera Rahilly and uploaded in July 2020, which means someone thought it worth recording even in its absence. That decision itself says something about how thinly the past can survive, and still be considered worth preserving.