Huck Finn's Treehouse and Tom Sawyer's Landing are actually two different places. The Landing is the kid's play area which used to include the petting zoo. It originally had some towers with rope netting for climbing in and around, a couple of ball rooms, a couple of man-made caves/rock tunnels, a mule drawn carousel, a cable slide, and places for parents to sit and relax. Later a small and bumpy roller coaster was added, the carousel was replaced with the one from the carousel barn, and the cable slide was taken out.
The Treehouse is where you climbed up through the hollow tree and went across a short swinging bridge to enter it. It had two rooms, the lower one being kind of a maze, and the upper one had a moonshine still, a self rocking rocker with a cat sitting next to it. The cat's tail moved back and forth just in time to avoid being rocked on. It had a mouse that ran around the room and a couple of other things. You left the upper room via a stairway on the outside that led down to a cave and what was called the infinity room, a dark room with mirrors and lights that made it look like you were in outer space with stars all around. When you exited that room you were back on the street.