May 6, 2019
Skydeck at Willis Tower in Chicago, Illinois
Located on the 103rd floor of the Willis Tower (formerly the Sears Tower), Skydeck is one of the best spots to take in panoramic views of downtown Chicago, Illinois. From its opening in 1973 until 1998, the Sears Tower was the tallest building in the world. Today, Skydeck still boasts being the tallest observation deck in the United States.