The Chamber Of The Flaming Skull - A giant skull is in the middle of a strange room and to activate it's flames surrounding it (probably cloth/paper mache for safety reasons, to give the illusion of it being ablaze). To activate the flames and allow passageway to other rooms nearby, place two rocks in it's eyes you can find on nearby columns. Placing the rocks in the eyes activates the flames and allows passageway through nearby rooms.