Quantum of the Seas is a huge ship, which usually cruises out of China, boasts a retractable roof over its pool for fun times come rain or shine. CREDIT: Courtesy Royal Caribbean International
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15 biggest cruise ships in the world
When Symphony of the Seas, an 18-deck cruise ship measuring longer than a nuclear-powered aircraft carrier, sailed out of port for the very first time this April, it smashed yet another size record in the cruise industry.
