2Millau Viaduct, Millau, France

The Millau Viaduct is a feat of modern engineering that stretches over the Tarn River Valley in southern France. Opened in 2004, it is the tallest bridge in the world, with its highest mast reaching 343 meters (1,125 feet) above the valley floor. The bridge’s sleek design, featuring a series of elegant, slender pillars, allows it to seamlessly blend into the surrounding landscape.