Donghai Bridge , Shanghai/Yangshan Island

China Zhongtie Major Bridge Engineering Group, Shanghai # 2 Engineering Co., Shanghai Urban Construction Group. Officially opened in December, 2005

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 -- was officially opened in December, 2005. 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 one of the world's -- longest over-sea bridge for only a couple of years, though. In 2008, the nearby 22-mile Hangzhou Bay Transoceanic Bridge , which also begins (or ends, depending on your journey) in Shanghai , will earn the superlative.