The example at Castlefarm in County Limerick sits in good lowland farming country, its circular mound rising to just 1.5 metres at its highest point and spanning roughly 30 metres across, with a slightly hollow centre that hints at how these enclosures once functioned as defended farmsteads. No fosse, the encircling ditch that typically accompanies such monuments, survives here, and no entrance can be made out. What remains is essentially a platform, the ghost of a bank that probably once rimmed its edge now reduced to a gentle swell in the ground.

Ringforts, known in Irish as raths when they featured earthen banks rather than stone construction, were the most common form of rural settlement in early medieval Ireland, typically dating from roughly the sixth to the twelfth century. They served as enclosed farmsteads for families of some local standing, the surrounding bank and ditch offering a degree of protection for livestock as much as for people. The Castlefarm example was formally described in 1942 and 1943 by O'Kelly, whose survey noted that a modern fence had already cut into the monument on its south-west side, a reminder of how incrementally agricultural land management erodes these low-lying sites. The record was compiled by Caimin O'Brien and uploaded to the national archive in February 2020, and today the outline of the monument remains detectable on Digital Globe aerial photographs, even where it is no longer legible from the ground.

For anyone hoping to locate the site, aerial imagery is genuinely the most reliable tool, since the monument blends easily into the surrounding farmland. The hollow centre and the slight rise of the mound are the details most likely to catch the eye at ground level, particularly in low winter light or after rain, when differential drainage can make subtle earthworks more readable. As with all monuments on private agricultural land in Ireland, access would require permission from the landowner, and the fence intrusion on the south-west side means the perimeter is no longer entirely intact. It is the kind of site that rewards patience and a certain tolerance for ambiguity, where the significance lies less in what is visible than in what the faint contours of the earth are still quietly holding.