When you reach the flock of flamingos in the river, you’ll see that there’s a slanted platform in the distance. Drive behind this rock to find treasure #8 in the water.
The first gate you need to pull open with the winch, you’ll be ambushed by some rebels. Dispose of them and then climb up to the platform on the left. There’s a wall you can break down with the use of a grenade, and behind it you’ll find treasure #9.
From here, continue the linear path. Eventually you’ll have to turn left, not far from the gate you just pulled down, where you’ll come across two waterfalls on the right-hand side. Find the entrance between the waterfalls to follow a short path to treasure #10.
When you finally get to the temple towards the end of the chapter, you’ll have to take out a slew of rebels. Afterward, climb the front of the temple to open the door with the wheel crank. Then go through the smaller door that opens up next to you and climb down to drop into the jeep with Nadine.
However, don’t drive just yet. Hop back out of the vehicle and turn around to find treasure #11 on the left side behind you.