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The Ultimate Abyss onboard Harmony of the Seas

Towering over 150 feet above sea level, the Ultimate Abyss launches thrill seekers into a serpentine of twists and turns on the world's biggest ship. Guests climb to the slide's glass platform, taking in the view from the top of the tallest slide at sea. From there, sliders launch into 216 feet of tunnels, whizzing past multi-sensory effects and blast onto the Boardwalk 10 decks below. Get a behind-the-scenes perspective on the adventure that is the Ultimate Abyss.

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Health and safety protocols, guest conduct rules, and regional travel restrictions vary by ship and destination, and are subject to change without notice. Due to evolving health protocols, imagery and messaging may not accurately reflect onboard and destination experiences, offerings, features, or itineraries. These may not be available during your voyage, may vary by ship and destination, and may be subject to change without notice.