Giovanni Marongiu Museum in Cabras, inaugurated in 1997, houses a large collection of archaeological finds which give the opportunity to retrace the millenary history of the Sinis Peninsula, a wide area which with Capo San Marco marks the north-west border of the Gulf of Oristano.
The exhibit is divided into two sections, respectively dedicated to two of the main local archaeological sites, Cuccuru is Arrius and Tharros.