In the Mexico you will have the first opportunity to ride on a motorbike. Use it to get to the first ruins.
Look at two columns, which are situated in the front part of the building. Jump on the lower one. Use it to jump to the higher one. From the tall column, jump on the wall and start climbing.
Move up and left. You will reach a small room with roundel. Grab the roundel with line and go outside.
Lower yourself a little and start swinging. In the appropriate moment make a jump to the next room. Take the head of jaguar from there.
This place will look as there is no exit. Of course, this is only illusion. Find the place, which is presented on the first picture and move to the top by recoiling the walls. Exit through the window and jump on the wooden beam, which is protruding from the column.
Jump on the ground and kill the cat. After that go back to the motorbike and ride among the stones.
You will reach the stairways with men's bodies. Leave the motorbike and go through partially opened door. You will find yourself near the puzzle with Maya's calendar.