8. Akashi-Kaikyo Bridge – Japan:
The longest suspension bridge in the world measures 12,800 feet across. It opened in 1998 after 12 years of construction. The three-span bridge crosses the Akashi Strait with 190,000 miles of wire cabling the roadways from the two towers. Bridge design had to account for earthquakes, high winds, and harsh sea currents crashing against the towers.
7. Brooklyn Bridge – New York City:
It may have taken 14 years to build, but when the Brooklyn Bridge opened in 1883 to connect Manhattan and Brooklyn, the single span of 1,595 feet suspended by four cables was a sight to behold. It still is. Designed by John A. Roebling and with the construction led by son Washington Roebling and his wife, Emily, the project stands as an enduring symbol for bridge construction the world over. It may have been the 1884 P.T. Barnum spectacle of leading a herd of 21 elephants across the bridge that early on cemented the bridge’s popularity. But today, from the 15-.5-inch diameter cables comprised of 5,434 parallel steel wires to the towers built of limestone, granite and cement, everything about the Brooklyn is iconic.