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2. Millau viaduct bridge, France
Towering over the Tarn River valley, the Millau Viaduct stands as a triumph of engineering and a modern French icon. At 1,125 feet above the ground, it's the world's tallest bridge, with sleek pylons piercing the sky. The vista is mesmerizing, but for those afraid of heights, crossing it is a nerve-wracking challenge. Floating above the earth with just a thin road beneath and endless sky around is both exhilarating and intimidating.
