I was interested to note your college tunneling page. Back when I was an undergrad at Louisiana State Univ, I began exploring the campus tunnel system. This was in the early 1980's, so much of this has probably changed since then.
The main system is under the "Quad" a central quadrangle which is bordered by the library and several of the major buildings for arts and sciences. This was easily accessed by a couple of points in the quad area. In this area, the tunnels range from wide walking tunnels to belly-crawls between steam pipes.
At this time, I located a map of most of the system (which I no longer have). Much of it is disconnected, meaning that a Quad explorer can't get to many of the interesting spots on other parts of the campus. There was an intriguing connection, I believe, to a tunnel which led beneath a road to the Journalism school building. I attempted it on a summer day only to find myself pinched out about halfway beneath the road in a maze of pipes. It could be passable given a very nimble explorer.
A few warnings for those who would attempt to explore this system: The pipes may be wrapped in asbestos, which is not always in great condition (hence can become airborne with ease and you will inhale it). Large cockroaches, rats, etc., are found frequently and usually right in front of your nose when you are belly crawling through a tight spot. Lighting is rare, so three sources of light are advisable, as when caving. If you get stuck somewhere, expect a LONG wait for help, if it ever arrives. The heat can be unbearable at times. And, much of the tunnel system is floored with dirt, which means mud since these tunnels are barely above the water table. You will exit smelling terrible and extremely dirty, which is sort of conspicuous. For this reason, I only explored after dark.
Finally, it goes without saying that the University considers this to be trespassing and will probably expell anyone caught in the tunnels. Ask yourself if it's worth it before you go. (As I was a fairly undistinguished student, already booted from one college, I figured it was.) If you have a nice scholarship, stay in the dorms at night.
Good luck
I'd appreciate remaining anonymous ...