7. Millau Viaduct, Millau, France - With a structure height of 343 metres (1,125 ft) the Millau Viaduct bridge is the tallest bridge in the world!  Opened in 2004, this 4 lanes bridge is a cable-stayed bridge that spans the valley of the River Tarn near Millau in southern France. The bridge has 7 piers of different heights. The second one is the tallest with a height of 244.96 m (803 ft 8 in) – making it the tallest structure in France, taller than the Eiffel Tower!