Symphony of the Seas is the novelty of the year at Royal Caribbean, and is the fourth ship of the Oasis class, the largest cruise ships in the world. From April 2018 Symphony of the seas will sail in the Mediterranean until October. As per Royal Caribbean script, the launch of a new ship means new incredible attractions on board including the Bionic Bar, where the barman is a robot, three multi-level slides with scary descents and twists. Among the new attractions, the Ultimate Abyss stands out, which is the tallest slide ever built on a cruise ship ... it measures 45 meters in height. Obviously everything that is present in the sister ships you will also find it on Symphony.