Nuraghe Arrubiu 

The Arrubiu nuraghe, built between the 13th and 9th centuries BC, also known as the "Red Giant" for its monumental structure and for the various shades of red of the lichens that color the surfaces of its walls. Majestic and imposing, this five-lobed nuraghe occupies an area of ​​about 5000 meters and it is still possible to admire large internal courtyards, stairs, entrances, corridors, domed rooms. It consists of a central keep and five side towers integrated by a bastion with very thick walls.