Nuovo Consorzio Trasporti Marittimi
This outfit offers tours including return trips to Cala Luna (€12), Cala Sisine (€18), Cala Mariolu (€26) and Cala Gabbiani (€26). A trip to the Grotta del Bue Marino costs €16.50, including entry to the cave. All tours are around €5 more in July and August. See the website for timetables.