It is easy to walk past without noticing it; the vegetation has done a thorough job of concealing it, and what remains of the wall has largely collapsed into a low scatter of large and smaller stones. Yet the outline is still legible: a roughly circular space measuring about 10.5 metres north to south and 9.5 metres east to west, defined by the remnants of a wall that once stood around 0.7 metres high and was built to a thickness of about 0.65 metres.

This kind of structure is generally classified as a hut site, a broad term covering the remains of a simple stone-walled dwelling or shelter of the sort found across upland and marginal land throughout Ireland. Such sites can be difficult to date without excavation, and their occupants are similarly hard to pin down; they may represent seasonal shelters used by those grazing animals on higher ground, or more permanent habitations from any number of periods. At Rossacoosane, the choice of location is telling in itself. The terrace provides a relatively level platform on an otherwise awkward slope, the encircling gorse and grass would have offered some natural windbreak, and the long sightlines south towards Kenmare Bay suggest that whoever used this place was not entirely cut off from the wider landscape around them.