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- Royal Caribbean's 274-night Ultimate World Cruise set sail on December 10, 2023.
- The ongoing around-the-world sailing has attracted plenty of internet attention.
- Take a look at the ship these travelers will be living on for the next nine months, the Serenade of the Seas.
Imagine living on a cruise ship for nine months as it sails around the world. For travelers aboard Royal Caribbean's ongoing 274-night "Ultimate World Cruise," that's reality.