The Skydeck Ledge at Willis Tower in Chicago is the best way to get a gorgeous view of the entire city. Along the way to the Skydeck, you will notice interactive touchscreens and a short movie documenting Chicago's architectural history and advances. When the weather is clear, you will actually be able to see parts of four different states, including Indiana to the south, Michigan to the east, and Wisconsin to the west. There is even a clear glass ledge that you can walk out into and look down at the Chicago streets below.