Geothermal Valley - Catacomb of Sacred Waters Challenge Tomb (Part 2)

Head down the steps from the campfire to the aqueduct.

There's a document (15/33) hidden behind the overturned boat to the right of the stairs. It is Thieves Among Us from the Catacomb of Sacred Waters series (Greek).

Do not try to swim across the rushing water. The current is too swift, and Lara will be swept over the edge onto the rocks below. To reach the building on the other side, start by approaching the rope-wrapped post on the left, which is attached to a water wheel.

Shoot a rope arrow into the rope coil on the prow of the little boat.

As the water wheel turns the post, it draws the boat toward you. When it moves alongside the ledge where Lara is standing, jump onto it.

The rope line doesn't hold for long, so quickly move next to the rope coil at the front of the boat and shoot the second rope-wrapped post near the little island in the middle of the aqueduct.

As the post rotates, it draws the boat closer to the island.

After a few moments, the rope line snaps and the boat starts to drift downstream. As it passes the lower end of the island, jump off the boat onto the land. (If you don't jump in time, and the boat drifts past the island, you can either try to shoot the second coil again so it pulls the boat back, or just reload the checkpoint and try again.)

In the raised enclosure on the island, you'll find another document (16/33), Rite of Passage from the Catacomb of Sacred Waters series (Greek), as well as 2 piles of Byzantine coins (10 coins total).