A proposed new skyscraper in downtown San Francisco would be the tallest building in the U.S. outside of New York and Chicago - bumping Philadelphia and Los Angeles down in the rankings. At 1,225 feet ...
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Insane megaprojects that were never built
Explore the most insane megaprojects that were never built, including the dream airport above New York, the most iconic hotel in the world, the mile-high Illinois skyscraper, America's tallest failed ...
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