Royal Caribbean has released incredible aerial photographs of their newest cruise ship, Harmony of the Seas. Harmony of the Seas is the largest cruise ship ever built and can carry more than 6,000 passengers. At a cost of $1 billion, Harmony of the Seas is the 25th cruise ship in Royal Caribbean’s fleet and has the following features: A 100-foot drop with The Ultimate Abyss, the tallest slide at sea, plunging courageous adrenaline seekers 10 stories down from deck 16 to the Boardwalk on deck 6 4,700,000 lbs. (2,150 tons) of water in 23 swimming pools, whirlpools, two FlowRider surf simulators