The image on the bottom, "Along the Way" shows the path that gets you to and from the Old 100. The image on top, "Cave" is taking from inside a the entrance to a cave on the path to the Old 100. The cave is probably 15-20 feet deep (don't quote me) and was created as the miners followed different veins of quartz into the mountain in the hopes of pursuing more gold. In this case, the fact that the cave does not continue on demonstrates that they abandoned their efforts here in hopes of better options elsewhere on the mountain.