And while it's a private space and very much NOT open to the public ("the status of The Secret Alley is pretty secret; we're not as out there publicly as we once were," Amanda says), there's a small chance if you're really nice and ask politely she'll give you a short tour (you can reach her here), and if you want to do something awesomely arts related, you might be able to rent a spot in the corner to do it.
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Grant Marek is Thrillist's Senior Cities Director and thinks more things should be hidden in safes stashed behind thrift store paintings. Hit him up with more secret stuff @grant_marek.
Evan Thompson is a photographer and freelance drinker with a proclivity for risk-taking. Find him in the tunnels on Instagram @evanthompsonphoto.