What makes the example at Coologe, in County Limerick's Coonagh Barony, quietly peculiar is that it exists primarily as an absence rather than a presence. There is no mound visible to the naked eye at ground level, no obvious earthwork to stumble across in the pasture. Instead, the monument announces itself from the air, as a circular patch of earth roughly seven and a half metres across where the buried ditch causes the grass above it to grow at a slightly different rate from everything around it.

The site was first identified during the Bruff aerial photographic survey in 1986, when a circular cropmark showed up on the survey image catalogued as Bruff 33(01). Cropmarks of this kind form because buried features, whether ditches, walls, or pits, affect soil moisture and depth, causing the vegetation above them to ripen faster or slower than the surrounding ground. Decades later, the outline was confirmed again on Digital Globe orthoimagery taken between 2011 and 2013, and on a Global Earth orthoimage dated 28 June 2018, each time showing the same circular form defined by its enclosing ditch. A second ring-barrow, recorded separately under reference LI024-226, lies approximately 185 metres to the north-west, suggesting this corner of the Limerick plain may have held some significance in the prehistoric landscape, though the record compiled by Martin Fitzpatrick and uploaded in July 2020 offers no further detail about date or excavation history.

The field sits roughly 100 metres north of a public road and about 300 metres south of the Glenatrahaun Stream, which marks the boundary with the townland of Ballynagally. The land is in agricultural use, so any visit would require permission from the landowner, and there is frankly little to see at ground level beyond a gentle irregularity in the pasture. The site rewards patience and a certain disposition toward the invisible; if you happen to visit in a dry summer when the ground is parched, the circular outline may just become legible as a faint variation in the grass. Otherwise, the aerial images remain the clearest record of what lies beneath.