Visited and measured in 1773 by Boswell and Johnson this sea cave is deemed to be the deepest in the Hebrides and was the setting for a scene from William Black’s novel “Castle Dare”. At 180 metres long it contains a large flat slab called "Fingal's Table" used as an altar by the "Culdees" of the early church. With a history steeped in mystery and magic, and full of geological interests, this reputed refuge for hermits is only accessible at a half or falling tide.