Visiting Las Vegas? Consider a side trip to Hoover Dam. It spans the Colorado River between Arizona and Nevada, about 30 miles southeast of Sin City. The massive dam, built between 1931 and 1936, is 726.4 feet deep, from foundation rock to the roadway on the crest of the dam. Hoover Dam generates, on average, about 4 billion kilowatt-hours of hydroelectric power each year for use in Nevada, Arizona and California — enough to serve 1.3 million people.
Our world is full of wonders great and small, ancient and contemporary, natural and man-made. Here are 15 modern marvels that fill us with awe through the sheer scale, beauty, backbreaking effort and inspiration that brought them into creation.
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