The biggest of them all

Royal Caribbean's Allure of the Seas is now the largest cruise ship on the high seas, barely taking over the honor from her sister ship, Oasis of the Seas.

The Allure of the Seas sets sail from Turku, Finland, for Florida on Oct. 29, 2010. Royal Caribbean's brand new ship will be the largest in the world, barely edging out her sister, Oasis of the Seas. Lehtikuva / Reuters
The Allure of the Seas features the first Starbucks on a cruise ship. Royal Caribbean
The Move On! Move On! Parade on the Royal Promenade features characters from DreamWorks Animation's "Madagascar." Royal Caribbean
Allure of the Seas has 16 passenger decks, 2,700 cabins, and can accommodate 6,300 passengers and 3,000 crewmembers. Markku Ulander / AFP - Getty Images
A carousel can be found on the Boardwalk aboard the Allure of the Seas. Royal Caribbean
The outdoor play area aboard Allure of the Seas includes a multifunctional court which can host games of basketball, volleyball and badminton. Lehtikuva / Reuters
The gigantic vessel is the sister ship of the Oasis of the Seas, which Royal Caribbean has been running since its delivery in December 2009. Like Oasis, Allure of the Seas cost the cruise line about $1.5 billion. Lehtikuva / Reuters
"There's something for everyone to discover on the grandest ships the world has ever seen," Royal Caribbean boasts on its website. Lehtikuva / Reuters
Allure of the Seas features an ice rink and entertainment including the Broadway musical "Chicago" and the aerial acrobatic show "Blue Planet." Royal Caribbean
There's no shortage of sweet treats aboard the Allure of the Seas, which has an onboard cupcake shop, ice cream parlor and doughnut shop. Royal Caribbean
The Allure of the Seas features a zipline that soars across an open-air atrium. Rob Lovitt
The Allure of the Seas measures nearly 1,200 feet long, towers 236 feet above the waterline and weighs 225,282 tons — 12 times more than the Eiffel Tower. Roni Lehti / AFP - Getty Images