Rise of the Tomb Raider: Reach the copper mill, walkthrough Rise of the Tomb Raider guide, walkthrough

You will get to a familiar place. However, you can now unlock one of its parts, behind which there is the copper mill that you can see in the distance. Zip down another line.

Right after that, you encounter a wounded remnant, who offers a mission to clear a nearby cave of wolves, thanks to which locals can hide there. You can accept the mission, or turn it down for the time being and go to the other end of the location, to the gate to the copper mill.