Lara comes by here during the level The Hidden City Temple District is located in the western part of Paititi, in front of the temple where Lara suspects the Silver Box of Ix Chel to reside.
It is located near a tree by a hut where empty cages are stored, across the way from a large stone staircase leading up to a hut where the Paititians are dyeing cloth. It is located in the hut where you are first brought upon getting into contact with Etzli, on the eastern side of Paititi. The entrance is just to the left of the next stairs leading up. Up the stairs on the left and up the rope ladder at the back wall. To find the cave entrance, go down the stairs from the market and cross the wooden bridge to the farming terraces on the other side. It is located on the eastern shore, below Unuratu's hut.