Where: Hangzhou Bay on the East China Sea, traversing the Qiantang River at the Yangtze River Delta.
Stats: 22 miles long.
Awe Factors: With waves that reach 25 feet high and crash on the shore at 19 miles per hour, the rough waters of Hangzhou Bay had to be studied for nearly a decade before plans were drawn. Construction itself took nearly five years. Now that this S-shaped, stayed-cable bridge is complete (it opened to the public in May 2008), commuters from Shanghai to Ningbo save two hours and will soon have a service area on the bridge to refuel, grab a bite, or even get a night’s sleep if needed.