how long did it take to build the 7 mile bridge in the keys
Seven Mile Bridge The current road bridge was constructed from 1978 to 1982.
Golden Gate Bridge The Frommer's travel guide describes the Golden Gate Bridge as "possibly the most beautiful, certainly the most photographed, bridge in the world."[8][9] At the time of its opening in 1937, it was both the longest and the tallest suspension bridge in the world, with a main span of 4,200 feet (1,280 m) and a total height of 746 feet (227 m).