Mousa Broch, located on the Shetland Islands, is one of the best preserved brochs. It towers over 13 metres above the surrounding countryside and is the tallest prehistoric building in Britain. Standing on the uninhabited island of Mousa, this broch can only be reached by boat. The broch contains three large chambers, which each have a stone cupboard built into the wall. A spiral stair also leads to six galleries. This broch appears twice in the Orkneyinga Saga collection of Norse histories.