6. Tsing Ma Bridge: Hong Kong, China
Hong Kong's Tsing Ma Bridge is the largest suspension bridge in the world to feature two decks and carry both road and rail traffic.
Not only that, but it was subjected to some serious wind tunnel testing as Hong Kong is subject to some powerful typhoons on a yearly basis. After costing HK$7.2 billion (US$920 million), the Tsing Ma Bridge opened in 1997.
There are no walkways on the bridge and it features sheltered carriageways on the lower deck when very strong winds prove to be too much for vehicles to safely handle.
The Pearl Bridge currently holds the title of "World's Longest Suspension Bridge" with a span of 1,991 meters. The second longest is China's Xihoumen Bridge.
The Pearl Bridge stood a true test of strength even before it opened when it survived the Kobe Earthquake on January 17, 1995.
Connecting the Chinese municipalities of Jiaxing and Ningbo in Zhejiang province, the 35-kilometer-long Hangzhou Bay Bridge is the longest trans-oceanic bridge in the world.
Known for its funky and innovative spiral approach, Shanghai's Nanpu Bridge designers came up with the novel idea to save space.
A combined bascule and suspension bridge in London, England, spanning the River Thames, the Tower Bridge was opened on June 30, 1894 by The Prince of Wales. It is among the top iconic landmarks in a city filled with iconic landmarks.
One of the final scenes of the Hollywood blockbuster "Sherlock Holmes" is played out on the bridge in the movie's climax.