Millau Viaduct, France

The elegant Millau Viaduct—the world's tallest vehicular bridge—rises 1,122 feet and stretches 1.5 miles across southern France's Tarn River Valley. Held aloft by seven slender, sail-like cable arrays designed by British architect Sir Norman Foster, the four-lane toll bridge opened in 2004, creating a direct route from Paris to the Mediterranean coast.