Willis Tower’s renovated viewing point is not for the faint of heart

The Willis Tower (aka Sears Tower) is an important building in the history of skyscrapers. Designed by Skidmore, Owings & Merrill (SOM), which also handled this recent Skydeck renovation, it was originally completed in 1973 and stood as the world’s tallest skyscraper for 25 years. Even now, it’s a very tall building, at 442 m (1,450 ft) in height and remains the USA’s third-tallest tower.

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