Below. The small cliff rises in front of where they would walk into the space, waterfall in front, pool, river going to the left, small rock rise to the right, and to the front and right is more clear space, as the cliff gets lower to the right. There is more forest to the left that the river runs into.

Edit: And when I say the waterfall is small I mean just in size. It's a pretty strong solid wall of water coming down, not a weak trickle just falling down the side of the rock wall.