First begun in 2003, the Xanadu shopping complex was slated to be one of the largest entertainment and retail complexes in the U.S., with 2.2 million square feet of leasable space.
Based on gross leasable area, or the amount of space devoted to revenue-producing operations like stores, amusements and food, the continent is home to nine of the world's 10 largest malls, six of which have been built since 2004.