Geothermal Valley - The Architect's Crypt (Part 1)

To reach the crypt entrance, head up the steep path to the northwest.

When you come to a wooden bridge near a small waterfall, get some cloth from a container on the right. Then cross the bridge and climb onto the low ledge ahead.

Just before the barricade of pointed logs, move into the sunny clearing on the right.

Here you'll find a survival cache (10/20) buried near the rock wall. (The next Explorer Satchel will reveal it on your map, but you can dig it up now.) There's also another bull's-eye (7/8) hanging from a dead tree. Shoot it down for the challenge.

Move to the edge and drop down onto the rock ledge below.

From there, carefully drop onto the next ledge...

...then the next.

Turn left and take a running jump to grab the next ledge between this one and the waterfall. Here you'll find an Explorer Satchel (3/5) that adds 4 new survival caches to your map. If you followed this walkthrough, you just found one of them on the ledge above. You won't be able to reach the others until later in the game.

Now jump and grab the ledge behind the waterfall and pull up.

Get more cloth and 2 gold coins from a container and follow the tunnel to the crypt entrance.