On the corner of the Castello sits this museum quarter. To be honest, the museums are only interesting for history buffs or those who like archeology. There is not much art to see, but the complex is nicely laid out.
Literally the top of the hill. The site was bombed and left abandoned for WWII until the very dynamic university of Cagliari transformed in the museum complex that it is now. Visit for the museums, the site and the wonderful views.