Exploring a hidden cave pt3

Now, my friend that had led us here had been telling us it was only about 20 ft deep. He was either joking, lying, or doesn't know measurements very well. We walked at least 50 meters into this place, and the more we walked the more readily apparent it became that this was a secret mine that had been abandoned at some point. There were several shallow offshoots, and right at the end were the beginnings of both an upward and downward excavation. It was dark, and kinda frightening, and the soft walls allowed for no echos... in fact, almost all sound was muted inside. It was a very cool experience, and I hope to find more of these - and get better photos.