After dragging yourself on your belly through the stream, it opens into a pool nearly 6 feet deep, and you are able to stand up. Then you have to climb this waterfall in order to get to the higher levels of the cave. I began calling this waterfall the "Gatekeeper" because it's challenging to climb, and if you can't make it up it, you can't see the rest of the cave. I've taken some spills on this one before I figured out a good way to climb it. Luckily there is 6 feet of water to land in if you mess up!