Millau Viaduct, France

Norman Foster's Millau Viaduct stands as the world's tallest bridge, with its highest mast soaring 343 meters—34 meters taller than the Eiffel Tower. Completed in 2004, this 2,460-meter cable-stayed structure spans the Tarn River valley, built in just three years at a cost of €394 million, 20% cheaper than the typical rival of similar scale. Its seven concrete piers, the tallest reaching 245 meters, support a road deck 270 meters above the valley floor, making it 1.4 times taller than the Golden Gate Bridge's towers at #1. The viaduct's design reduced construction time by 50% compared to conventional methods, earning it multiple design awards. With 10,000 vehicles crossing daily, it stands as a 21st-century engineering marvel, outperforming #2's structural height records.