$22 for Illinois nonresidents, $11 for residents. You can buy online or go buy tickets at the front desk in the building. It's also one of the destinations included in the city pass and Chicago go.
25 if you're not from Chicago.
Definitely buy the City Pass. It really is worth it.
Beautiful
I bought the city pass because I wanted to know Chicago.for more information check here https://www.citypass.com/chicago
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