At Knockalisheen in County Waterford, a shallow circular depression in the grass marks a place that locals long called a lios, the Irish term for a ringfort, a type of enclosed farmstead typically dating from the early medieval period. What makes this site quietly notable is precisely what is no longer there: around 1950, the earthwork was removed, probably cleared for agricultural use, as happened to thousands of such sites across Ireland during the twentieth century. What survives is a ghost of the original, a grass-covered circular area some 27 metres in diameter, its outline still legible as a low scarp rising to a maximum height of about 0.8 metres.

The enclosure sits on a north-south spur near the top of a south-facing slope, with slightly higher ground to the north and the Nier river running roughly east-west about 200 metres to the south. The position is telling. Ringforts were almost always placed with care, favouring elevated ground that offered visibility over the surrounding landscape, proximity to water, and natural drainage. The Nier valley in the Comeragh Mountains is a quiet stretch of inland Waterford, and whoever built and occupied this enclosure would have looked out over the same river that still runs below. The scarp, what remains of what was once a more substantial earthen bank, is best preserved along the downslope east-west axis, where gravity has helped rather than hindered its survival.