Oasis Class ship Harmony of the Seas touts the ultimate combination of adventures for guests of all ages, which features Ultimate Abyss, the tallest slide at sea; a trio of high-speed waterslides known as The Perfect Storm, twin FlowRider surf simulators, a variety of restaurants that serve up a world of flavors.

The Harmony of the Seas is an Oasis-class cruise ship owned and operated by Royal Caribbean International. At the time of its launch, it was the largest cruise ship in the world, and even in 2026, it remains a marvel of marine engineering. It is a "mega-ship" designed around the "neighborhood" concept, featuring seven distinct areas including Central Park (a lush garden with real trees), the Boardwalk, and the Royal Promenade. Structurally, it is characterized by its unique split-stern design, which allows for the AquaTheater at the back and an open-air center. This ship is effectively a floating city, capable of carrying over 6,600 passengers at maximum capacity. It features "first-at-sea" amenities like the Ultimate Abyss (a 10-story dry slide), robotic bartenders at the Bionic Bar, and high-tech entertainment in Studio B. It is designed for multi-generational travelers who want a high-energy, activity-packed vacation where the ship itself is the primary destination rather than just a mode of transport between ports.