Medieval Times Georgia Tickets

Designed by architectural firm Skidmore, Owings & Merrill - who also designed the Burj Khalifa - One World is the tallest building in the Western Hemisphere and the sixth tallest building in the world. The One World Observatory - located on the 100th, 101st and 102nd floors - doesn’t stop bringing the 'wow'; from the moment you enter the building, to its elevator rides, all the way up to the top of New York City.

It used to be the Sears Tower, but in 2009, London-based insurance broker Willis Group Holdings acquired the naming rights. No matter what you call it (everybody still refers to it as Sears Tower), it's an architectural icon. When it was built in 1973 it was the tallest building in the world. It's now 14th-tallest, but offers unrivaled views of the Windy City, and sees more than a million visitors each year.