Royal Caribbean has opened bookings for cruises on board its new ship, Symphony of the Seas.

The fourth Oasis-class vessel will be the world’s largest cruise ship with 28 more staterooms than her sister ship, Harmony of the Seas, and weighing 230,000 tons.

The 26th ship in the Royal Caribbean fleet will begin sailing in April 2018 and spend her inaugural season in the Mediterranean, calling at ports in Barcelona, Palma de Mallorca, Provence, Florence, Rome and Naples.

In November 2018 the ship will then head to Miami to begin seven-night eastern and western Caribbean itineraries.

Features on the Symphony include a seven neighbourhood concept, bionic bar robot powered by Makr Shakr, Broadway-style entertainment, its waterfront Aquatheatre and the Ultimate Abyss, the tallest slide at sea, similar to those on the Harmony of the seas.

The new ship and its sister ship Allure of the Seas will operate out of the a new 170,000-square-foot terminal in Miami.