Qingdao Haiwan - The Worlds Longest Sea Bridge-1

That structure features two bridges running side by side and is 23.87 miles (38.42km) long. The three-way Qingdao Haiwan Bridge is a staggering 174 times longer than Londons Tower Bridge, over the Thames River and shaves 19 miles off the drive from Qingdao to Huangdao. Two separate groups of workers have been building the different ends of the structure since 2006. With an overall length of 42.58km, the route between Qingdao and Huangdao will be shortened by 30km, cutting the travel time by about 20 minutes.