At the summit of a ridge in County Waterford, buried within a coniferous plantation, sits an earthwork whose entrance has never been identified. That last detail is quietly unsettling. Most ringforts, the circular enclosures built across Ireland from roughly the early medieval period, preserve at least a break in their bank where people and livestock once passed through. Here, the gap has either been lost to centuries of erosion and forestry, or was perhaps never straightforward to begin with.

The enclosure at Liscamnabo is subcircular in plan, measuring approximately 78 metres north to south and 70 metres east to west, making it a fairly substantial example. Its defining feature is an earthen bank, between 3.5 and 4.5 metres wide, which still stands to an internal height of up to 0.9 metres and an external height of up to 1.4 metres. Beyond the bank runs an outer fosse, a shallow ditch cut into the ground to increase the effective height of the bank as seen from outside. The combination of bank and fosse was a standard form of enclosure across early Ireland, used to define farmsteads, mark status, and provide a degree of protection for animals. What makes this particular site unusual is not its construction but its concealment, both by the plantation that now covers the ridge and by the unresolved question of where, or whether, its entrance survives.