The Hidden City – Crypt of Qispi, the Merchant (part 1)

Begin at the western end of the long rope bridge, near the exit from the TEMPLE OF KUKULKAN. When you first passed this way, two guards blocked the bridge, so you would not have been able to reach the crypt. If you are returning to this area later in the game, you can fast travel to the Temple of Kukulkan Base Camp, which only appears after you've cleared this area.

Move to the edge of the cliff, just to the right of the bridge.

Here's the same view after the base camp has appeared.

Drop and hang from the edge.

Then traverse to the left..

Climb down the rock overhang.

Then rappel down...

...until Lara is hanging roughly level with the man-made stone ledge off to the left. Point the camera that way, then swing back and forth to gather momentum...

...jump to grab the ledge, and pull up.

Dig up a survival cache (30/34) just ahead, where the ledge juts out on the left. Then enter the tunnel on the right.

Follow the gore-strewn tunnel to a low opening. Drop down on the other side...

...and slide down a muddy slope. There are no spikes or other hazards to watch out for, and Lara lands safely below.

As you enter the next room, you'll pass a jar of supplies on the left.

Inside on the right is a document (37/42), Reconnaissance (Quechua/The Resistance) and a pile of jade ore.

On the opposite wall, there's a mural you can examine for information, though it doesn't count as an "official" collectible.

Move into the doorway to the north, but don't rush forward. There's a deep pit ahead. Jump over to the dangling wooden elevator and scramble up the slats to grab the bar at the top.

Ride it down to the room below.

Grab some random supplies from the jar on the right and open the sarcophagus to receive a Vestige: Yaway's Wooden Greaves, which provide extra protection against fire and knockdowns, plus 750 gold pieces. This also counts toward the Speak of the Dead Challenge, in which you must uncover the secrets of 4 ancient crypts in Paititi.