On reclaimed pasture at Moanroe, in the barony of Coonagh, a circular cropmark roughly eight metres in diameter appears in aerial photography, its outline formed by a ditch and an outer bank that are all but invisible at ground level. This is a ring barrow, a type of low earthen funerary monument associated with prehistoric burial practice, in which a central mound or flat area is enclosed by one or more circular ditches and banks. The monument itself survives largely as a cropmark, meaning the buried features influence how vegetation grows over them, leaving traces that show up clearly in dry conditions when photographed from altitude.

The site was recorded by Caimin O'Brien, drawing on details provided by Edmond O'Donovan, and uploaded to the national monument record in September 2020. The cropmark was identified from an Ordnance Survey Ireland orthophoto taken in late 2005 and confirmed by a Google Earth image captured on 18 November 2018. What makes the Moanroe example particularly interesting in its landscape context is that it does not stand alone. Two further ring barrows lie within close range, one approximately 120 metres to the northwest and another around 105 metres in the same direction, suggesting this area of reclaimed pasture was once a focal point for funerary activity, a small cluster of monuments that would have been visible to one another across what is now agricultural ground.

Because the monument survives primarily as a subsurface feature, there is little to see from the ground without knowing precisely where to look. The reclaimed pasture setting means the land is level and the views in all directions are moderate rather than dramatic, giving little sense from a casual visit of what lies beneath. Anyone with an interest in the site would do well to consult the aerial images held by the National Monuments Service before visiting, as these give a far clearer picture of the monument's form and extent than anything visible in the field. The companion ring barrows catalogued nearby add useful context, and taken together, the three sites point to a prehistoric use of this stretch of County Limerick that the landscape itself no longer makes legible.