The main attraction of Cagliari there are 4 historic districts (Castello, Marina, Stampace and Villanova) where you can find almost all the museum and monuments of the city.
Who want to build a tour itinerary may refer to these links:
...Without forgetting the beach Poetto, the hills of Monte Urpinu, San Michele and its Castle Museum, Monte Claro and the Civic Market Mercato Civico di San Benedetto.
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