Take a trip to Prison Island, where giant tortoises have lived since 1919, and indulge in snorkeling and sunbathing. Once a quarantine station, the island also houses a historic prison building. Afterward, explore Zanzibar's spice plantations, where you'll encounter exotic spices such as cinnamon, nutmeg, and vanilla, and enjoy a cup of spice tea while delving into the island's fascinating spice history.