Given the name of this cruise line, guests are justified in expecting expertise when it comes to the Caribbean islands. Guests aboard one of the Royal Caribbean's luxury ships might spend a day communing with stingrays in Grand Cayman, exploring Puerto Rico's El Yunque Rainforest or discovering the Mayan ruins of Cozumel. Depending on the cruise you select, you might also find yourself in a paradise called Labadee. This exclusive, private Royal Caribbean destination features seven distinct neighborhoods where you can shop for local handicrafts or laze in a luxury cabana on the beach. After you've braved the longest zip line over water in the world or dived 800 feet below sea level in a research submarine, treat yourself to a signature Labaduzee frozen drink in a hammock beneath a shady tree.