This is a broch, a fortified home built during the Iron Age, some 2,100 years ago. Brochs, unique to Scotland, are dry-stone, twin-walled, round towers up to 30m across and 15m high. Part of a reproduction broch was built at Strathyre, Scotland by the West of Scotland Dry Walling Association using only tools used around 2000 years ago: A team of 20 spent five days constructing a 5m high section of the Dun Lubnaig Broch. Click through for details.
Broch of Mousa, Shetland Islands The construction of Alban “brochs” as early as 100 BC and all the other substantial archeological data available such as Cladh Chiaran in Ardnamurchan, Skara Brae in Orkney, Bosta House in Lewis and Machrie Moor Stone Circle in Arran, clearly show a society no less advanced and considerably more successful against the Romans than the Britons were. Brochs were round stone towers with an internal diameter of between twenty-five and forty feet.
Viking ring fort and settlement, the Shetland Islands, Jarlshof, Scotland. It has been described as "one of the most remarkable archaeological sites ever excavated in the British Isles". It contains remains dating from 2500 BC up to the 17th century AD.