The Marmilla villages, mostly small rural agglomerations which rarely have more than a thousand inhabitants, still have some important elements of interest. In addition to the regional parks of the Giara plateau and Monte Arci and the imposing and famous nuragic palace of Barumini, the main attractions of the area are the ancient typical Campidanese houses, the numerous nuraghi, the majestic thousand-year-old olive trees, the precious retables preserved in some churches, megalithic tombs and dark epogean eras. Some important museums scattered throughout the area complete the tourist offer, which attracts and satisfies the many tourists who visit the Marmilla every year.
In the northernmost part of this sub-region is Usellus, a small town which stands in an area which has been inhabited since the Neolithic era. The centre achieved its maximum splendour in Roman times with the name Uselis, when it was proclaimed with the status of Colonia Iulia Augusta. Its territory, which is largely hilly and mountainous, maintains traces of a rich past which was inherited, as well as from the Roman period, from the millennium in which Usellus was a bishopric and then the chief town of curatoria during the Giudicato of Arborea.
