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World's Coolest Observation Decks

CN Tower

Bill Brooks/Alamy

CN Tower, Toronto

Toronto’s famous television tower, 1,815 feet high, was the world’s tallest structure (taller than the tallest skyscrapers) until the Burj Khalifa came along. It is also the home of the original observation-deck glass floor, 256 square feet of it, installed in 1994. But unlike on Chicago’s Ledge, here you can clearly see the structural members that support the thing.

Observe This: In 2008, they added North America’s first glass-floored elevator. Traveling up to deck level at 1,136 feet, it’s also the world’s highest glass-bottomed elevator. —Karrie Jacobs

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