That gentle arc, running from west to north-east along a pasture on an east-facing slope above a river valley in County Limerick, is all that separates this site from complete erasure. The enclosure itself has been levelled, and apart from this surviving fragment of bank, no other trace of the original monument is visible on the ground.

A ringfort, sometimes called a rath, is a roughly circular enclosure defined by one or more earthen banks and ditches, typically built during the early medieval period in Ireland and used as a defended farmstead. The example at Lisbane was recorded on the 1923 Ordnance Survey six-inch map as a circular embanked enclosure with a diameter of approximately twenty-five metres, positioned in the north-west corner of a field. At that time it was sufficiently intact to be mapped. Since then, agricultural activity has removed most of it. What remains is a section of the original enclosing bank, retaining an internal height of around 0.9 metres and an external height of approximately 1.2 metres, which has endured precisely because it was absorbed into the field boundary and given a practical secondary function. The distinction between the old and the new is still readable in the materials: the curved section is of earthen construction, while the adjoining boundary sections are linear and built in dry stone. The notes were compiled by Denis Power and uploaded in August 2011.

The site sits in ordinary working farmland, and there is no formal access or visitor infrastructure. The curving field boundary is most legible when viewed from a distance, where the contrast between the arc and the straight runs of dry-stone walling on either side becomes apparent. Visiting in late winter or early spring, when grass cover is low, gives the best chance of reading the slight difference in height between the surviving bank and the surrounding ground. It is the kind of place where knowing what to look for matters considerably more than any visible drama on offer.