Oasis of the Seas: Inside the world's largest and most expensive ever cruise ship. It took six years and cost over 800 million pounds to build. And now the Oasis of the Seas will finally be launched into the ocean with the maiden voyage set for December.At a mighty 225,282 grt, the Oasis of the Seas, which can accommodate up to 6,296 passengers, is almost twice as large as any other cruise ship to dock in the UK.
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