Known as Knockaunpheige Fort or, more evocatively, Lios na Caillí, meaning the fort of the hag, the site has been completely levelled, leaving no surface trace whatsoever. Ringforts, roughly circular enclosures defined by earthen banks and ditches, were among the most common settlement forms in early medieval Ireland, used as enclosed farmsteads by families of some local standing. This one has been erased so thoroughly that without the cartographic record it would be impossible to know anything had ever stood here.

What we know of the site comes from the Ordnance Survey maps of 1841 to 1842 and a later edition from 1916, both of which recorded it as a circular enclosure. The fact that it still appeared on the 1916 map suggests it had not yet been fully removed by the turn of the twentieth century, though at some point in the decades following, the earthworks were cleared. The Irish name, Lios na Caillí, carries a particular resonance. The cailleach, or hag, is a recurring figure in Irish folklore, often associated with ancient landscape features, mountains, and megalithic structures. Attaching her name to a ringfort implies that local memory of the site reached back far enough for it to acquire a mythological character, which is not uncommon for earthworks of this kind.