<p>Glen Canyon Bridge and Dam, Arizona. The bridge has an overall length of 1,271 feet (387 m) with a deck 700 feet (210 m) above the Colorado river, making it one of the highest bridges in the US. It was completed in 1959. The dam was completed just a few years later, in 1966. (Photo: Jassen Todorov/Caters News) </p>
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