360 Chicago

Once called the John Hancock Observatory (it is located in the John Hancock building), the 360 Chicago offers unparalleled views of the Chicago skyline and Lake Michigan. You will pay for the experience, though -the lowest admission price is about $19 per person. For the most memorable experience, time your visit to coincide around dusk when the city and skyline are swathed in an array of colors like an artist's palette (submitted by Chris V).