Mousa Broch located on the island of Mousa in The Shetland Islands, off the north coast of Scotland, is the finest example of an Iron Age, drystone, round tower in the world and among the oldest buildings in Britain.
Archaeologists differ as to the purpose of "brochs" some arguing that they were early forts or castles, while other specialists see them as dwellings for the elites of their times.
Brochs can be found in the Shetland Islands, the Hebrides, Orkney and parts of northern Scotland. There are around 570 brochs in total scattered throughout this wide, geographical area.
Mousa Broch is believed to date from around 100 BCE and is 13m high with thick walls and only one entrance. Mousa Broch is built in stone without the use of any mortar.
Inside would have been two floors built of wood. Mousa Broch is referred to in Norse sagas.
Mousa Broch is well known among bird enthusiasts for its breeding European storm-petrels and the island is a Special Protection Area for the birds. Other animals to be found on the island include common and grey seals, guillemots and Arctic Terns.
Mousa has been uninhabited since the 19th century. The island of Mousa lies off the east coast of Mainland Shetland about 24 km south of Lerwick.
Mousa or "Mosey" means "Mossy Island" in Old Norse and Mousa has some lovely lichen and alpine-like flowers.
Access to Mousa is by passenger-only ferry in the summer season from Leebitton, Sandwick, 18km south of Lerwick.