This sequence is also shown in a gameplay video.
After getting the bronze reward, as shown in the previous set of screenshots, turn around and step off the other side of the ledge.
Traverse to the left and then drop to grab the narrow crevice below. Continue climbing to the left.
Keep going, around the corner and on to the left.
When you near the end of this crevice, you'll be able to see the gold reward in an alcove below on the left. Drop to grab the next lower handhold, then the next. Climb a little farther to the left and pull up into the alcove with the gold reward (1/1).
Return the way you came to the narrow ledge between the two caves: Hang from the opening, climb to the right, jump up twice, climb to the right around the corner, jump up, traverse right and pull up in the opening. (The return trip is not shown, but it's just the reverse of the three screenshots above.)
When you have both rewards and are ready to move on, stand on the ledge between the two open areas, with the cave where the bronze reward was behind Lara. Jump to grab the narrow ledge on the left wall. Climb to the right as far as you can.
Then leap across the gap to grab a handhold on the wall to the right. (At this point you can drop down to the ledge below, but it's not necessary.)
Climb all the way to the left and jump back to grab the vertical pole.
Climb to the top of the pole and jump to the right. Traverse all the way to the right.
Then jump to grab a break-away ledge on the wall way off to the right. Traverse quickly to the right (tap Interact to go faster) and jump straight up to grab the ledge above before your handhold collapses completely. Pull up into the opening.
[Part 1 | Return to the Nepal Walkthrough]