Harmony of the Seas - the biggest cruise ship ever made. The modern marvel of maritime travel has all the fun and satisfaction that every passenger needs. Here is the full timelapse of construction, starting from the first piece of steel, until June 2015 float out. Along being the biggest ship in Oasis class, Harmony has 5 more things than her sister ships: 1. Water slides 2. Splashaway Bay water park 3. Ultimate Abyss 4. Two story Wonderland restaurant 5. First Oasis class ship to get a Bionic Bar Royal Caribbean's Harmony of the Seas is its third Oasis-class cruiser and and its being built at STX France shipyards; scheduled to launch in April 2016. Its first trip will be from Barcelona to Rome but ship will also stop in London and Fort Lauderdale, Florida, in the US. With a gross tonnage of 226,000, a length of 1,187 feet and maximum cruising speed of 23 knots, the Harmony will be slightly larger and more fuel efficient than its sister ships the Oasis of the Seas and Allure of the Seas. NOTE* All the video materials in this video are copyrighted to STX FRANCE and their parties.