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Royal Caribbean is building the Oasis at the Aker shipyards in Turku, Finland. Built with 55,000 tons of steel, the megaboat's six engines will generate 135,000 horsepower and gulp 13 tons of diesel fuel per hour.

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Last updated August 18 2008: 10:09 AM ET
World Trade Center With an estimated $20 billion pricetag, the WTC redevelopment is one of the most expensive ongoing projects in the world. (more)
Oil city Reliance Industries is spending $6 billion to expand a massive refining hub in India that is one-third the area of Manhattan and will one day process 5% of the world's gasoline. (more)