The Acropolis - Canyon Leading Back to the Geothermal Valley

Follow the canyon northward. Shoot an arrow into the beam ahead to make a rope line so you can cross the first wide gap.

As you move to the edge of the next shallow pit, the pop-up Grapple Axe tutorial obscures your view of the area below. Before swinging across...

...drop down into the pit to retrieve the Explorer Satchel (1/1). This adds the locations of 3 survival caches to your map.

NOTE: These caches were covered earlier in the walkthrough, but if you didn't find them, you'll be able to fast travel back for them soon.

Climb up on the south side of the pit where you started.

Then swing across the gap by by jumping forward and pressing Interact (X/E) to grapple the metal rings above.

Continue forward across a fallen tree trunk.

To use your new grapple axe to reach the ledge high above on the right, jump out into the gap...

...and press Interact to hook the ledge above. Then climb up.

Move forward a few steps and turn around to spot a document (9/10) lying in the bushes. It is Bones of the Earth from the Codex of Survival series (Greek).

Continue to the north until you come to a wide chasm with another set of metal rings and a climbable wall beyond. Jump out into the gap and quickly press Interact to grapple the rings.

As you swing forward, Lara automatically releases the grapple.

But you'll need to press Interact again to latch on. (If she slips, press Interact again at the prompt for a saving grab.) Then climb to the right, jump to grab the next thin handhold, and climb along to the right until you can pull up.

Continue through the canyon to the next deep pit. Jump into the gap and press Interact to grapple the climbing wall directly ahead.

Climb the cable until Lara is hanging in front of the climbable wall. Then press Interact again to switch from the grapple axe to two climbing axes.

Continue climbing to the ledge above.

Then follow the tunnel to emerge near the Cliffside Lookout Base Camp on the south side of the GEOTHERMAL VALLEY.