Finished in 1974, it was the tallest building in the world until 1998. Currently, it is the fifth tallest. It has 108 stories and it is 1451 feet high. The towers above top out at 1730 feet. The glass balcony opened in summer of 2009, extends out 4 feet. It is quite scary at first but it can hold 5 tons. On a clear day, you can see Wisconsin and Indiana.