Thought this was was kind of neat, tonights episode of NBC's Stay Tuned (A news story on Snapchat) featured a picture of The Curtis Block as well as they Keynote Buildings in a short about colonizing Mars.
Saying that the Red Line does get moved underground in the foreseeable future, what are they going to do with the tunnel part of the NCL? seems like a bit of a hole in the planning, maybe they could shove a McDonalds in there who knows.
Yes, there is the one under Bankers Hall thats been sort of repurposed into the ampitheatre thats accessible via the ground floor of the shopping centre, then theres also that one thats under city hall too but i could be wrong.
You do realize that they will be tunnelling deep enough through downtown to be hardly disturbing the streets above, not only that but the will be deep enough so that they are still able move the Red Line into a subway tunnel under 8th street, If you Google "how subways tunnels are dug" you can...