Price: $9 Billion
This 18-million-square-foot, $9 billion casino complex is billed as the most expensive private construction project in U.S. history.
CityCenter, a city-within-a-city on the Las Vegas Strip, includes a sprawling casino, 4 hotels, 2,400 homes and 42 restaurants and bars.
Completed in 2009, the lavish project was $1.2 billion over-budget and continues to be a major drag for parent company MGM Resorts, which posted a loss of $1.44 billion in 2010.
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