That's funny, I wouldn't have thougth the tunnels would be interesting. Our campus has a series of tunnels that look exactly the same, steam pipes waste waters etc. Except that ours are available for staff/students to go between building without having to go out doors. It does get quite cold in the winter. Here's the map posted on the web:
http://umanitoba.ca/maps/tunnels/index.shtml
-pc