Hey. Here at OSU (Oklahoma State University) we have similar tunnels. We found like a grate that was unlocked with a 25 foot ladder we climbed down. It was pretty cool, similar to the pictures. Except we went into a room where it was like a break room or something and there was a guy in there. We started to run but then decided not to. He led us out and didnt call the cops or anything. Turns out he led us out into the basement of the Student Union. Didnt know there was an entrance there.