As for sailing, head to Sailing and Surf School Irzl, a legitimate sailing and surf school in operation since 1898. You don't have to travel to Greece to learn how to sail, as Irzl offers courses for both beginners and experienced sailors, and can provide you with the license needed to legally sail anywhere in the world. Rent a sailing boat for approximately 24 € per hour, or participate in their Monday sailing school regatta during the season (late May to early September).