Looks like an old avalanche of rocks. Each rock was covered with moss as far as you could see. It was very interesting.

This was built to protect the trains from avalanches and rock slides

Embedded in the cement

Dark wet and cold, but probably warmer in the winter time compared to the outside

Absolutely delicious water flowing from the hill

These guys started at the mountain top and just went downhill. You would need 2 trucks for that. They had just ridden through the 3 mile long tunnel in the dark (with bike headlights)!

My legs were tired for 2 more days!