Deep Dark Depths

Deep Dark Depths is a hidden level found in Hazy Maze Cave in some personalized copies of Super Mario 64. it is described a small, dark area made almost entirely of rock, as well as dead grass and black moss around the level. It is found by finding a hole somewhere in Hazy Maze Cave and entering it.

Geography
The level is described as a linear, "claustrophobic" rectangular area made mostly of cracked rock. Some rock is covered in moss, and some of the ground has dead grass, implying there was once light in this area. There are several rocks jutting out of the walls leading up to the top of the level, where there is a star. There is also a lake with a star at the bottom that is located near an edge of t he level. However, the lake is too deep to swim to the bottom of without the Metal Cap, which can be found on one of the rocks near the opposite end of the level.

Star 1
In this mission, the player has to use the Metal Cap to dive down a lake in the level to find a star. Attempting to go down without the Metal Cap will take too long, and result in the player drowning due to the lake's depth.

Star 2
In this mission, the player has to climb up the level using rocks along the walls to find a star near the top of the level.