This one, in rough pasture in Athlacca South, County Limerick, has all but disappeared into the ground, its outline now legible only from the air, where it shows up as a faint oval cropmark against the surrounding field. A ringfort, or rath, was a roughly circular enclosed farmstead of the early medieval period, typically defined by an earthen bank and ditch, and used as a defended homestead for a family of some local standing. At Athlacca South, that enclosure has been so thoroughly reduced that what once stood as a coherent platform is now a ghost of itself, detectable mainly through the differential growth of grass and crops above its buried remains.

Historic Ordnance Survey maps document the gradual erosion of the site with some precision. The 1840 six-inch edition records a circular platform defined by a scarp, already intersected at the south-east by a post-1700 field boundary running north-east to south-west. By the 1897 twenty-five-inch edition, the shape had shifted to roughly oval, measuring approximately 29 metres north to south and 28 metres east to west, and was being further truncated from the south-south-east by that same encroaching field boundary. The site appears on OSi historic maps under the name Monaraha Fort, and sits in rough pasture around 398 metres south-east of the Morningstar River and 480 metres south-west of Glebe House. Orthophotographs taken between 2005 and 2012, as well as Google Earth imagery, confirm that the oval outline remains visible as a cropmark, even where nothing obvious survives above ground.

There is no managed access to the site, which lies on private agricultural land, and the monument itself offers nothing obvious to the casual eye at ground level. The cropmark is most legible from aerial or satellite imagery rather than from a field visit, making resources such as the OSi historic map viewer or Google Earth the most practical way to study it. Those with a particular interest in landscape archaeology may find it worth comparing the 1840 and 1897 map editions side by side to trace how successive field improvements have eaten into the monument over the course of the nineteenth century, a process that continued well into the twentieth.