The Losa nuraghe is one of Sardinia's best preserved megalithic monuments. The nuraghe is a kind of stone defensive tower with a truncated cone shape, built in what is known as Cyclopean style, which consisted in piling up huge blocks without using mortar or other binding material.
Archaeologists largely agree that the nuraghi had the same function as later medieval castles.
Nearby are the ruins of nuragic and Punic-Roman villages.