The Ultimate Abyss Waterslide on your Royal Caribbean cruise ship is not for the faint of heart. This 216-foot-long slide plummets 10 decks from the Sports Zone to the Boardwalk, giving riders a thrilling and exhilarating experience. As riders sit on specially designed mats, they shoot into the dark, tunnel-like slides at speeds of up to 9 miles per hour. With flashing lights and audio effects, the Ultimate Abyss takes guests on a multi-sensory journey into the unknown. For those daring enough to take the plunge, the Ultimate Abyss is a must-try attraction on any Royal Caribbean cruise.