Every nation is proud of its highway network, whether it is called Autobahn, freeway, interstate or autópálya. They are not easy to build. Lack of space or difficult geographycal conditons ask for creative (and expensive) solutions, including blowing up half a mountain, digging a tunnel or pulling down a whole neighbourhood.

The challening construction is usually necessary as they typically provide a compact and practical alternative to many other types of constructions. But which overpasses would you give a thumbs up for?

Photo credit: Sung Ming Whang