A spectacle that is even more captivating if you observe it from the majestic tower that dominates it from above. The large beach of Bosa Marina is located immediately south of the tourist port and the houses in the coastal district of the medieval town of Bosa, the most important town in the Planargia subregion. This is a wide, golden, sandy shore, a kilometre long and washed by a sea of emerald green and blue waters and a sandy seabed that gently slopes out towards the open sea. Its transparent, clean waters earns it 5 blue sails of the Legambiente (Italian environmentalist association) every year. It is the ideal beach for a totally relaxing day, perfect for families with children, thanks also to services like beach establishments with equipment and boat rentals, places for dining and refreshments, boat trips and scuba diving. You can enjoy numerous beach games and water sports here, like kitesurfing and windsurfing. The lido ends with a trachyte pier connecting the mainland to the Isola Rossa (Red island) alongside the beach, dominated by the Aragonese tower where temporary exhibitions are held in the summer.

The Bosa coastline is approximately twenty kilometres long: to the south, there is the beach of Turas, a wide sandy shore of grey sand and a green, crystal clear sea with its immediately deep waters. The other pearls are found to the north, along the scenic road that leads to Alghero, starting from S'Abba Druche, which is four kilometres from the town. One kilometre further north, there is the splendid Compoltitu, white sand in a natural harbour, partly enclosed and framed by smooth rocks. Two kilometres further on, there is Cala Sa Codulera: pebbles and transparent waters overlooked by an Aragonese tower. Next to it is Torre Argentina, a series of inlets, little coves and white cliffs, close to each other, with alternating sand and flat rocks plunging into the cobalt blue sea. A little further up, almost at Capo Marargiu, there is the promontory of the griffon vultures - where you can see this rare bird of prey - and the sheltered Cala Managu: fine, light amber-coloured sand and blue-green waters that are always calm. Opposite, there is a little island, making it even more spellbinding.