Bosphorus Bridge is one of two bridges in Istanbul, Turkey, that connect Europe with Asia over the Bosphorus Strait. Stats: 4,954 feet long; 210 feet above sea level. Awe Factors: Completed in 1973, this suspension bridge, the only bridge in the world linking two continents (Europe and Asia), has been in the works since 490 B.C., when the bridge was made of a fleet of boats.