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Millau Viaduct, France Just imagine: concrete - 206 000 tons; steel deck - 36 000 tons. No, it's really exciting: the bridge structure (viaduct) of sir Norman foster is an example of practicality, you can even say prosaic, and at the same time exquisite beauty. When the engineers were tasked with building a bridge across the entire valley of the tarn river in the South of France, they accomplished a record-breaking technological feat. Namely, the bridge was built with a length of 2,460 meters, which includes the world's highest supports, the highest mast and the highest road flooring. But the reason why drivers (and tourists) stop and just stare is the extraordinary feeling of lightness and fragility, which surprisingly distinguishes so much grandiose building. The bridge costs €5.02, but the entrance to the visitor centre, which is open daily, is free of charge.