I remember the tunnels well. For two years they would always lead to a locked gate or door, then my roommate found a wad of keys down there. That opened up a whole new world. Sneaking up into the Rotunda at 1am for a midnight snack, as well as several other things that can't be mentioned here.
Here are a couple pics from way back then, the first is a chuckar harvest photo on the Chief Joe appt deck (I tried to find a photo without a beer in it but couldn't) the second is one of three times the authorities came to visit us at Campus Commons North apartment 312.