The Al Hasa Quarry contain 5 chests. It's very easy to fall and to die. There are vines in which to help you down. At the bottom of the quarry is a door that leads inside the mountain, it is recomended to bring a friend, as the pressure plate reveals a crafting table. The crafting table can also be accessed by throwing items onto the pressure plate. nontheless, if you are on your own, stay away, as it can trap you.