On the face in the ruins, use the Translation Page to spell out "open" in the symbols. The teeth to press are the 3rd, 4th, 6th, and 7th from the left, then the nose.
(see related question)
It is in the shark cave
In the huge cave.
go to the ancient ruins and you will see a cave
On top of the cave
You get the translation paper and go to the cave its on the top left of the cave.
To get the ingredients on shark tooth island,you must open the door in the cave,get the 2 ingredients and go back to the native islander and give him the stuff
in the cave and you have to get the code to get in the room the has it and the code is on the top of the cave
you get on the electric thing and jump left and you're there
on top of the cave in the Ancient Ruins
Well if you want to know where the symbols are, they're on the roof of the shark tooth cave and to get on top of the cave, you climb up the vines until you're even with the roof, then run and jump onto it
open that's O P E N
Press the third, fourth, sixth, and seventh teeth from the left, and then push the nose. This should open the door -- because these symbols spell "Open" in hieroglyphics.