001 SE of Solemn Crevasse: A Survival Cache is on a lower ledge, in the open cavern.
002 N of Solemn Crevasse: Another Survival Cache is in a small area on the eastern side of the map, as you advance north from base camp. It’s on a tiny patch of land by the water.
003 NW of Solemn Crevasse: While working on the Orrery puzzle, look for a Mural on the middle tier of the room.
004 N of Solemn Crevasse: At the top of the Orrery puzzle you get a Codex.
005 N of Solemn Crevasse: On the way out of the map, search the northern end of the final tunnel for a Survival Cache.