The Kelp Forest is a large forest on the outskirts of Bikini Bottom that appeared in "Club SpongeBob", "Bummer Vacation", "To Save a Squirrel" and a few other episodes. Instead of trees, there are huge kelp plants. It seems to be more like a jungle than a forest. It is inhabitated by a large range of animals. Inside, there is a meadow that SpongeBob, Patrick, and Squidward used as a camping area when they were trapped there. It's also one of the levels in Battle for Bikini Bottom game. It is also one of the places where SpongeBob can go have a mission in The Yellow Avenger. It also appears briefly in the episode "Eek! An Urchin". When SpongeBob called Mr. Krabs saying is it far enough to dump the sea urchins, Mr. Krabs said no and tells SpongeBob to go farther.
Kelp Swamp is a large swamp in the middle of the Kelp Forest. It consists of various islands alongside the swampy waters.
Kelp Caves is a large cavern in the middle of the Kelp Forest. To get there one must go across the bridge that is located in the Kelp Swamp. It is slightly maze-like in design.
Kelp Vines is an area outside of the Kelp Caves, consisting of a large vine slide. Mermaid Man is the world record owner of the slide for reasons unknown.
Kelp Forest Road is a road that runs through the Kelp Forest. This was only seen in "Bummer Vacation", when Mr. Krabs drove SpongeBob far away from the Krusty Krab in order to keep him from coming back until after his vacation time is up. It is most likely the road is used for hikers.