Hazy Maze Cave

Hazy Maze Cave, also known as the Hazy Maze Caves, is an underground cave level and the sixth course in Super Mario 64 and Super Mario 64 DS. In both games, the entrance to the course is located in the basement of the Mushroom Castle behind the unmarked ★ door. Inside, there is a room with a small pool in the middle, which is the entrance to the course. The course has many paths and bottomless pits, as well as a large cavern that is home to a giant sea creature named Dorrie. Several maps are also placed on the walls to help the player figure out where they are and where to go.

Layout
The area the player starts off in contains a Metal Box and two paths. The one to the right is a hall with several fire geysers that leads to the Hazy Maze and Red Coin area, with the left path having a hall with a large gap the player must long-jump across that leads to the area with the boulders and the underground cavern.

Through the door at the end of the left path is a large pit that boulders continuously fall into, as well as a Spinning Heart on the left side of it and a hall to the other end of the course on the right side. This area also contains a Scuttle Bug and a Swoop. Up the ramp the boulders are rolling down is a ledge that holds a Power Star in the N64 version or a 1-Up Mushroom in the DS version, as well as a door that leads to an elevator room. In the elevator room is a ring of coins under a ! Block that holds a 1-Up Mushroom, as well as a Power Star behind a chain fence that can be accessed only through the Hazy Maze. Down the elevator is a large circular cavern with Dorrie swimming in the water. There are two doors in this area, with the fenced-off one leading to a Power Star and the door on the ledge that the player has to use Dorrie to reach leading to the Cavern of the Metal Cap (N64)/Behind the Waterfall (DS).

The door at the end of the right path from the start of the level leads to an open area containing the level's Red Coins and the lifts needed to reach them, as well as several Scuttle Bugs and Mr. I's. To the right of the room are an elevator that takes the player to the end of the course and a door that leads to the Hazy Maze. The Hazy Maze is a large maze covered in a toxic cloud that damages the player if they stand in it for too long. The maze can lead to two different Power Stars or back into the other room.

Statistics from Super Mario 64

 * Total Number of Coins: 139 (134 according to Nintendo Power)
 * Caps Found: Metal Cap (5)
 * Spinning Heart: Near the black hole on a ledge.
 * Cannons: (none)
 * 1-Up Mushrooms (4):
 * Box Mushroom : #1 Above the bottomless hole on a platform. #2 Next to the elevator to the underground lake.
 * Moles Mushrooms : #3 & 4 By continually jumping on two sets of Monty Moles in the toxic maze, the player can get the two mushrooms.
 * Warps: (none)

Trivia

 * When the player is inside the Hazy Maze or at the Underground Lake, there is a layer of chant added to the beat of the music. Everywhere else, the Super Mario Bros. Underground Theme is added to the beat instead.
 * The level Wet-Dry World uses the same music, with the main theme in the uptown area and the layer of chant in the downtown area.
 * The pyramid in Shifting Sand Land, the igloo in Snowman's Land, the Cavern of the Metal Cap, and Wiggler's cave of Tiny-Huge Island, as well as Goomboss Battle in the DS version, also use this music, except that both layers are heard simultaneously.
 * With a properly timed dive, the player can actually dive forever on the left side of the gate underground once they have opened it.
 * The minigame Dorrie Dip from Mario Party 3 takes place in an area that resembles this course. Dorrie also makes an appearance in this minigame.
 * This is the only course in the Nintendo 64 version to have a secret level inside it, and one of the two in the DS version, the other being Big Boo Battle in Big Boo's Haunt.
 * In Super Mario 64 DS, Wario Caps are available in all missions even if he has not been rescued. In the first mission, the cap is found on Dorrie's head, and in all the others, it is on a Goomba near the start.