Both Zak and Annie should fly to Cairo, but send Zak on from there to Zaire, and have him visit the Shaman once again. The Shaman will explain to Zak how to use the yellow crystal for teleportation purposes. Zak should then rejoin Annie in Cairo. On one of the two legs of the Sphinx will be some more of those ubiquitous yellow markings. Zak must recreate the drawing seen in the chamber on Mars below the depiction of the Sphinx, which will open a secret door. Both Annie and Zak must go inside. Yep, it's another maze, but (a) it's lighted, and (b) there's an easy solution. Always go through the doorway with a picture of the sun over it (or in one case, the doorway is at the end of a corridor, and the sun is above and to the right). Eventually you will find a door with what looks like a pair of horns above it. Inside you will find some hieroglyphics which only Annie can read. They will instruct her to push the left button, then the right button, and the centre button. (One of the hieroglyphics looks suspiciously like an Imperial fighter from Star Wars, by the way.) Once the panel opens, Zak should USE his yellow crayon on his wallpaper map, and you should write down the last set of strange markings (whew) by the depiction of the Great Face.