Let a sea captain whisk you to some of Zákinthos’s top attractions. During a boat tour you'll see Shipwreck Beach, Marathonisi Islet and Laganas Bay, home to the turtle sanctuary. At the Blue Caves, keep an eye out for monk seals; they feed and sleep in the area. Most outfitters include stops for swimming, so pack your suit and waterproof sunscreen. Some excursions also run out to the Keri Sea Caves, whose grottoes, white cliffs and sapphire water make for striking photos. Both snorkeling and diving are popular there.