Wet-Dry World

Wet-Dry World is the eleventh course in Super Mario 64. Considered one of the most bizarre levels in the game because of its strange themeing, Wet-Dry World is commonly associated with negative feelings and anomalous sightings.

Negative Emotional Aura
Wet-Dry World is said to have a negative emotional aura, felt within multiple players[1]. The reason is still unknown, but it likely has something to do with the stage's music and appearance.

Human Brain Diagram
Supposedly, there is a hidden texture of a human brain within Wet-Dry World's assets. However, there has been no credible source for this texture. Opposingly, some state that the stage is a human brain model, which could be Stanley's brain.

Trivia

 * Wet-Dry World's skybox is an image of the town Casares, in Spain.
 * Certain textures from The Legend of Zelda: Ocarina of Time were used throughout this map, namely the unopenable doors.