Lios na gCraobh, the ringfort of the bushes, sits in the north Kerry landscape near Finuge, and while the name once described something conspicuous enough to be named after its vegetation, the earthwork itself has been steadily sinking into the ground for centuries. What remains is a circular depression and a low bank, easy to walk past without a second glance.

A ringfort, or rath, is a roughly circular enclosure defined by an earthen bank and, originally, a ditch, used in early medieval Ireland as a farmstead or defended homestead. Lisnagrave is described as univallate, meaning it has a single enclosing bank rather than the two or three concentric rings found at more elaborate sites. That bank now rises only between 0.4 and 0.8 metres at its highest points, and spreads between nine and eleven metres wide at its base, which suggests considerable slumping and erosion over time. The enclosed area measures roughly 21 metres north to south and 25 metres east to west, dimensions consistent with a modest but functional early settlement. The site appears on both the first and second editions of the Ordnance Survey maps, which places its documented existence at least as far back as the nineteenth century, and the Irish placename itself suggests the enclosure was recognisable to local people long before any cartographer arrived.