Others exist, for now, mostly as geometry: a circle roughly thirty metres across, pressed into the earth and legible only from above. At Tobermalug in County Limerick, a ringfort makes itself known not through any visible upstanding remains but through the faint language of cropmarks, the subtle differences in vegetation growth that betray buried features to a camera looking straight down.

A ringfort, or rath, is one of the most common monument types in the Irish countryside, a roughly circular enclosure defined by an earthen bank and external ditch, typically built and occupied during the early medieval period, between roughly the fifth and twelfth centuries. They served as farmsteads and status markers for farming families. The Tobermalug example sits in poorly drained, recently planted forestry, lying about 145 metres west of the Groody River. What the record captures is a cropmark of a circular area defined by a scarp and fosse, that is, a slope and a ditch, which became visible on Ordnance Survey Ireland orthoimages and Google Earth aerial photographs taken in 2018. A second ringfort, recorded separately, lies approximately 200 metres to the west, suggesting this stretch of ground was once more actively settled than its current appearance implies. The site was compiled and uploaded to the record by Fiona Rooney in July 2020, drawing on aerial imagery from both June 2018 and April 2006.

Because the monument sits within recently planted forestry on poorly drained ground, physical access is unlikely to be straightforward, and there is little to see at ground level in any conventional sense. The site is, at present, one for those with an interest in remote sensing and aerial archaeology rather than walkers hoping to stand inside an ancient enclosure. The Google Earth orthoimage dated 28 June 2018 remains the clearest way to appreciate the form of the monument, and comparing it with the earlier 2006 image gives a sense of how vegetation change and land use can alternately reveal and obscure what lies beneath.