A largely collapsed ring of stone and earth sits in rough pasture on the Iveragh Peninsula, tucked between Knockroe and Knocknafreaghaun mountains just south of the broad plain of the Laune river. Most visitors to Kerry pass within a few kilometres of sites like this without ever registering them, and yet the very state of this one, its walls slumped and half-swallowed by the ground, makes the traces that do remain more legible as a place where people actually lived.

The site is a caher, the Irish term for a stone-built ringfort, the roughly circular enclosures that served as farmsteads across early medieval Ireland, typically occupied between around the fifth and twelfth centuries. This example is roughly oval, measuring about 27.5 metres across its longest axis. Its enclosing bank averages 1.5 metres in external height and retains a slightly battered, or inward-leaning, face of drystone masonry along much of its northern sector, with internal facing preserved only in the south-west quadrant. Inside the enclosure, the footings of two circular huts survive. The larger, on the west side, measures 4.6 by 4.3 metres internally and still has its wall footings standing up to 1.1 metres high; its entrance gap faces south. The second hut, immediately to the east of the first, is roughly 4 metres in diameter with an entrance facing east and footings reaching 0.8 metres. Local tradition also holds that the site contains a souterrain, an underground passage or chamber of the kind commonly associated with Irish ringforts, used for storage or concealment, though this has not been formally confirmed at Lisleibane. The site's Irish name, Lios Leadhbáin, uses lios, the Irish word for a ringfort enclosure, suggesting the place retained its identity in the local landscape long after it fell out of use.