I remember my freshman year we decided to go into the mines (before they were sealed off). Being the geniuses that we were, we only brought a single flashlight with nearly exhausted batteries.

I vividly remember climbing up a wooden staircase in the mine in complete darkness that went up at least a couple hundred feet. Then in the dark we somehow moved over to a platform that led to more mines at an upper level. Eventually we found a second exit and then had to climb down some pretty steep faces in the canyon to get back down to the trail.