Donghai Bridge,Shanghai/Yangshan, China

A key phase in the development of the world's largest deep-sea port was completed when China's first cross-sea bridge—the 20-mile, six-lane Donghai Bridge.Stretching across the East China Sea, the graceful cable-stay structure connects Shanghai to Yangshan Island, set to become China's first free-trade port (and the world's largest container port) upon its completion in 2010. To provide a safer driving route in the typhoons and high waves known to hit the region, Donghai Bridge is designed in an S-shape. The structure, reported by Shanghai Daily to have cost $1.2 billion, will hold its title of China's—and the world's—longest over-sea bridge.