Corbelling is an ancient building technique in which successive courses of dry, unmortared stone are laid so that each projects slightly inward over the one below, eventually closing into a roof without the use of any timber or mortar. The result is a self-supporting dome of fitted stone, and examples survive across Kerry in varying states of preservation. This one has fared less well than most: collapse and accumulated overgrowth have reduced the walling to a height of roughly 0.7 metres, and the original shape survives more as an impression than as a standing structure. The interior space measured approximately 4.7 metres by 3.95 metres, which, while modest, would have been workable as a shelter or seasonal dwelling.