Sky View Observatory

Columbia Center is the second tallest structure on the West Coast at 284.2 m (932 ft) it (after Los Angeles' U.S. Bank Tower). It contains 70 stories of class-A office space. It was designed by Chester L. Lindsey Architects. The tower was originally designed to be about 306.5 m (1,006 ft), but federal regulations by the Federal Aviation Administration (FAA) would not allow it to be that tall so close to the nearby Sea-Tac Airport.

There is an observation deck on the 73rd floor which offers views of Seattle and environs.

http://skyviewobservatory.com/