Chicago - Sears Tower Skydeck

Until 1996, when the Petronas Tower was built in Kuala Lumpur, the 110 story Sears Tower was the world's tallest office block. While there are now at least three taller buildings, the view from here is still one that should not be missed. On a clear day you can see 40 to 50 miles (64km) over four states, and you get a bird's eye view of Chicago's impressive architecture.

The Sears Tower was designed by Bruce Graham for at Skidmore, Owings, and Merrill and took three years to build. It opened to the public in 1974.

The building is 1453 feet (452m) tall with an observation area, called the SkyDeck, on the 103rd floor, 1,353 feet (442m) above the ground.

Interactive and interpretative exhibits in the observatory educate visitors about Chicago's colorful history. Alexander Calder's mobile, "Universe," is located in the Tower lobby.