Su Nuraxi di Barumini is the most important of Sardinia’s famous “nuraghes”. These megalithic structures emerged in the second millennium BC and are unique to Sardinia - in fact, there’s no parallel anywhere else in the world. These conical towers, made of heavy stone, could reach up to three stories, and had interior spiral staircases and vaulted chambers. While some 7000 nuraghes have been found, Su Nuraxi di Barumini is by far the finest. Built up from around 1500BC to 600 AD, Su Nuraxi consists of a central tower, and four corner towers connected by a bastion, all of which is surrounded by some 50 huts, wells and cisterns. A guided tour will bring you through the site, through the small single room huts where the villagers lived, and up the 3500-year-old staircase to the top of the tower so you can see the settlement from above.