This is really cool. I would love to railfan this, even though it does kind of make me get claustrophobic and gives me overall hibigeebies. (how does one spell heebie-jeebies?) http://users.ameritech.net/chicagotunnel/tunnel1.html
It's almost better just to have it sealed up for the future. But I can see shooting a couple horror movies in there.
Have seen the bookfor sale & nearly been tempted to buy just out of curiosity.Very unusual system,one would wonder why it lost money Great find TGB
Jason, I have to give credit to my father who grew up in Chicago. An old friend of his from North Western University sent him the link.
Thanks for this link. It made me realize that my son had worked above those tunnels for years. And I'll try to find out whether they encountered any evidence when they dealt with that Wacker Drive.