6 Hidden Tunnels You Never Knew Were Beneath This Popular Illinois City

There are at least six hidden tunnels beneath Chicago that all serve a different purpose. Not everyone knows these tunnels exist. Check them out:

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Do you know of any other hidden tunnels in Illinois? Share your knowledge with us below in the comments.

Address: 435 N Clark St, Chicago, IL 60654, USA
Address: 676-8 N Orleans St, Chicago, IL 60654, USA
Address: 835 N Michigan Ave, Chicago, IL 60611, USA
Address: Chicago, IL 60606, USA