Speaking of slides, Royal Caribbean added one more slide to Harmony of the Seas, but this one features no water. In fact, Royal Caribbean wanted to create a truly thrilling experience with the Ultimate Abyss slide. Located on the aft of the ship, the Ultimate Abyss is more than 150 feet above sea level and offers side-by-side slides that send guests down 10 decks at a rate of 9 miles per hour.
Guests board the slide by climbing stairs that lead directly into the mouth of a giant angler fish, where they get into a customized mat and then descend down the slide, traversing 216 feet of a multi-sensory tunnel. Guests can reach a speed of 9 miles per hour, and it is the kind of thrill experience unlike anything else at sea.
The Ultimate Abyss is free and available for rides mostly during the day.