It will be available as soon as you gain access to the location.
To start the mission, you must talk to a man.
He will tell you about his relationship with Isabela and direct you to the cemetery.
At the cemetery you will have to talk to an elderly woman and some children.
The children will give you a riddle.
When you get it, you must give it to them.
We have marked the place where the treasure is located in the screenshot above.
After completing the task for the children, you must help the woman raise thecross.
When you do this, you will have to travel along a trail of crosses.
When you reach the final cross, examine it, and it will kick off the entrance to thecrypt.
You must find Isabela in the crypt.
The crypt is located in the northern part of the zone, in the middle of the jungle.
Entering the crypt is not complicated, and Isabela is right next to the sarcophagus.
To get to the sarcophagus and Isabela, you have to go down two walls.
On the first of these you might use the ice-axe and a rope, or go down a ladder.
After jumping into the water, you will see thesarcophagus, and Isabela right next to it.
You will acquire Kantu’s Gilded Vest from the sarcophagus.
After talking to Isabela, you must go back to Guillermo, he will send you back to Manu.
Manu will direct you to the tomb ofThirsty Gods.You must fully complete the tomb.
If you have previously completed the tomb, the mission will automatically end.
The Thirsty Gods Tomb can be found in the eastern part of the location, amongst the lakes.
To get to it you have to swim a large distance underwater.
However, the road is quite simple and there are no opponents or traps.
To do this, take your bow and shoot an arrow towards therope.
After this shot, the water level will drop and Lara will be dragged underwater.
The water current will drag Lara into the next room.
There you will have to swim through thenarrow gapin order to get to the location of the riddle.

Your first task will be to cut the ropes which are attached to the raft.
To do this, you have to dive and cut them manually.
You must be careful because there are flocks of piranhas in the water.
If they catch you, you have little chance of survival.
Do not make any sudden movements, simply leave the water and wait for the piranhas to disappear.
To release the second raft you have to dive into a small cave.
The rope which is holding the raft is located there.
A special machine is waiting for you in the second part of the riddle.
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