It’s a while before your first treasure in chapter 6; you don’t need to start searching until you finally get inside the entrance to the giant cow monument with Nadine.
Take all the steps downward until you come to the Sala vs. the tiger wall sculpture. When you go right of here there will be an alcove with some drinking vessels.
Treasure #37 sits on the step next to them.
Keep following the path through the corridors. You'll come to a tunnel that you have to crouch through; when you get to the end, you’ll start to hear loud noises.
Ascend the steps but turn left as soon as you reach the top to find treasure #38. It’ll be right before you come across the elephant. If you reach the elephant first, you won’t be able to turn back for the treasure.
After the magical elephant ride, and the elephant has been reunited with her herd, run straight across the water to the opposite side.
On the right-hand side of the stone steps, before you go up, is a broken Sala sculpture, and a little statue of a temple just beyond it.
Treasure #39 is just here.
As you carry on forward up the steps and traverse your way around the platforms, you’ll come to a gap in the wall that you have to vault up into and crouch down.
The next treasure - #40 – is hiding in this gap.
And, finally, as you come out the other side, you’ll be prompted to swing from a branch jutting out of the wall. Simply swing on over to the platform on the other side to pick up treasure #41.