First scene: Starting into the first cave. There is a big "window" to the right about half way through the cave. As the scene zooms back you'll see where it appears that the cave goes back to an end (where it's dark). There is actually another hole at the far end of the cave (through that dark area -- it's not really that dark when you are there). Starting with the second scene, we are in the far opening (the one through the darkness) looking at the area between the two caves. You can see the second cave to the left of the rope figure hung on the cliff side.
For the last scene, we are closer to the second cave.