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+39 0789 956 200 | On the Mediterranean Sea, Liscia Di Vacca, Arzachena, Sardinia. Poltu Quatu Marina dell'Orso is an inlet marked on the nautical charts as Stintino dell'Orso. It is located between the bay of Liscia di Vacca and Baja Sardinia, opposite the island of Caprera and the small island of Cappuccini.