Florida's Seven Mile Bridge, which runs between the Gulf of Mexico and the Florida Strait, measures (you guessed it) roughly seven miles. It was one of the world's longest bridges at the time it was built in 1982.

Florida's Seven Mile Bridge, which runs between the Gulf of Mexico and the Florida Strait, measures (you guessed it) roughly seven miles. It was one of the world's longest bridges at the time it was built in 1982.