Take a trip to Prison Island, home to giant tortoises since 1919, where you can relax with snorkeling and sunbathing. The island, which once served as a quarantine station, also has a historical prison building to explore. Afterward, head to Zanzibar's spice plantations, where you'll uncover exotic spices such as cinnamon, nutmeg, and vanilla, and enjoy a cup of spice tea while learning about the island's rich spice heritage.