Royal Caribbean International’s Harmony of the Seas will feature the longest slide at sea when it launches next May.

The Ultimate Abyss, a dry slide, spirals 100 feet from the top of the Aquatheatre to the Boardwalk neighbourhood below and is one of several new features on the Oasis-class vessel, which joins siblings Oasis of the Seas and Allure of the Seas as one of the world’s largest cruise ships.

The vessel will also be home to Royal Caribbean’s first water slides – Supercell, Typhoon and Cyclone, which together have been dubbed the Perfect Storm – and Splashaway Bay, a children’s’ aquapark with water cannons, mini slides and a giant bucket that dumps water on unsuspecting people below.

Harmony of the Seas will also have several features that debuted on Royal Caribbean’s Quantum-class ships including a Bionic Bar with robot bartenders, inside cabins with virtual balconies, wristbands in place of key cards to open cabins doors and sign for drinks, and super-fast internet.

The ship is spending its maiden season sailing seven-night cruises in the Mediterranean round-trip from Barcelona with prices from £1,450 per person cruise-only departing May 29. It moves to Fort Lauderdale in October for a winter season of seven-night Eastern and Western Caribbean cruises.