The ringfort sitting in pasture about a hundred metres north of the Limerick and Tipperary county boundary carries the old place-name Rathcallaun on Ordnance Survey historic maps, yet when a fieldworker came to ask about it in the late 1950s, nobody locally had heard the name at all. The monument itself remained, the name had quietly slipped out of living memory, and the two had come apart without anyone noticing.

Ringforts, sometimes called raths, are among the most common archaeological features in the Irish countryside. They were typically enclosed farmsteads of the early medieval period, defined by one or more earthen banks and ditches, and this one follows that general pattern. The 1840 edition of the Ordnance Survey six-inch map shows it as a circular area enclosed by a bank, sitting in the north-east corner of a field. By the 1897 twenty-five-inch edition, it is recorded as a circular platform roughly eighteen metres across, defined by a scarp, positioned about eleven metres north of a drainage channel running north-east to south-west. The most detailed early description comes from O'Dwyer, writing between 1958 and 1961, who recorded a smooth-surfaced grassy mound some 24.3 metres in diameter and 5.5 metres high, with faint traces of a wide shallow ditch and a wide outer bank visible on the south and east sides. That scale, particularly the height, suggests a substantial structure by any measure. More recently, the platform and its defining fosse, the surrounding ditch, remain clearly legible on orthophotographs taken between 2005 and 2012, and on a Google Earth image from November 2018.

The site sits in ordinary agricultural pasture, and like most ringforts it is on private farmland, so any visit would require the landowner's permission. For those with an interest in landscape archaeology, the aerial images available through the Ordnance Survey Ireland viewer or Google Earth give a reasonable impression of the monument's form without setting foot in the field. What is striking from those images, and from O'Dwyer's measured description, is how well-preserved the mound appears despite sitting so close to a county boundary and its associated drainage works. The faint outer bank on the south and east sides, noted in the 1960 record, is the kind of detail easy to miss underfoot but worth looking for if the light is low and raking across the ground.