Millau Viaduct is the world's tallest bridge, a claim based on the height of the towers, which are taller than the Eiffel Tower. The height of the bridge deck itself is only the 17th tallest in the world, yet driving over it still feels like you're literally in the clouds.
This cable stay bridge is on the E11, a popular motorway route between Calais and the French and Spanish Mediterranean coasts. It's 890 feet from the road deck to the valley below, and the views are fantastic when it is not shrouded in cloud (which it commonly is).
The architects of this bridge have created a thing of wonder. How did anybody build it? In fact many of the engineering aspects of the bridge were already worked out before the architects were given the brief to make the bridge look so good. Building this bridge really was a team effort; the list of famous engineering companies involved is too long to include here. The story of the construction process is available widely but it is a great experience to read about at the visitor centre while enjoying an excellent view of the bridge itself.