That is precisely the situation in Ballynagally, County Limerick, where a ring-barrow, a circular earthen mound typically associated with Bronze Age burial practice and defined by a surrounding ditch and outer bank, sits quietly within a larger enclosure in flat, well-managed pasture. The site never made it onto the historic Ordnance Survey Ireland maps, meaning it passed unrecorded through the era when so much of Ireland's ancient landscape was first formally documented. For a long time, it simply was not on anyone's official list.

The barrow came to light not through excavation or accidental discovery, but through a close re-examination of aerial photography. The Bruff aerial photographic survey of 1986 was the original source, though the site was only properly identified during a later review of that material. Robert Dolan, examining the imagery through a stereoscope, an instrument that renders aerial photographs in three dimensions, noted in March 2015 that the small barrow on the north-west side of the enclosure was, in his words, "very clear through stereoscope." Subsequent orthoimages from Ordnance Survey Ireland taken between 2005 and 2012, Digital Globe imagery from 2011 to 2013, and Google Earth imagery as recent as November 2018 all show the site, though faintly, as a subtle mark on the land. A second ring-barrow lies approximately 165 metres to the north-north-west, suggesting the area may have held some significance in the prehistoric period, though the relationship between the two monuments is not yet documented in detail. The record was compiled by Edmond O'Donovan and uploaded to the national monument database in September 2020.

The site sits approximately 180 metres north of the townland boundary with Scart, in what is now ordinary agricultural land. There is no public access point marked, and the barrow is on private farmland, so any interest in visiting should be approached with that in mind. Because the earthworks are so slight at ground level, the site is essentially invisible without the advantage of aerial perspective or specialist equipment. Visitors with a serious interest in the monument would do better to consult the national monuments record and its associated orthoimagery before making any approach, as the subtle cropmark or soilmark that reveals the barrow from above offers little to the eye of someone standing in the field itself.