I bought a gocard and went to the Field Natural History Museum, Willis Tower and three John Hancock Centers. Since the expiration date is one month from the date of use, it is recommended if you do not stay longer. While in Chicago, I went to the museum, but I bought a ticket for the museum. If you want to explore more than one place, it's not a bad choice to buy more. If you're going to Chicago in the winter, the Michigan Cruise Tour is written in the guide, but it's not really running. It's getting colder after mid-January.