Hidden Ravine Base Camp

077 SW of Hidden Ravine camp: After sliding down the waterfall, a Survival Cache is buried outside the small entrance to the depths of the Tomb.

078 NE of Hidden Ravine camp: After losing your grip and tumbling into the Tomb, swim across the wooden structure. A Survival Cache is buried by some stalagmites. Items in the Tomb are not listed on the map.

079080 E of Hidden Ravine camp: A Relic is by the rotating platform, next to a table. Once you have it, a Document is just a few steps away, by the fallen mine cart.

081082 N of Hidden Ravine camp: Use the nearby rope post to create a zipline to the lower rotation crank. A Relic is next to the crank. Once you have it, climb the stairs for a Survival Cache next to the rotating platform.

083 NE of Hidden Ravine camp: In the Codex room, look for the Document on the floor nearby.