Minecraft wiki entry for Exploring_caves, associated text: One fairly easy marker method is the "torch on the right" rule. While exploring a cave simply place torches on the right side of the wall as players go deeper in. This way, no matter how complicated and even intertwined the caves get, you can always find their way back because if the torch is on the left of a cave wall, that means they are heading towards the exit. Conversely, if it's on the right, it means they are heading deeper in.