Wet-Dry World

Wet-Dry World is the eleventh course in Super Mario 64, found on the Second Floor. Wet-Dry World is considered the level with the most common anomaly sightings, likely due to the level standing out from all others in the game.

Geography
Wet-Dry World is split into 2 segments: the top section and downtown. The top section is the area where the player starts, and has various crystals scattered around this part of the level. Upon touching these crystals, the water in the level will raise or lower to the crystal's level. This water can start at top height, medium height, or bottom height depending on the player's height when entering the painting.

The downtown part of the level is accessed by raising the water level enough to reach a small area leading to the downtown area. This part of the level begins flooded until a crystal is activated to lower the water level. This downtown area is made of several houses in a closed-off area, with none of them being enterable.

Missions

 * 1) SHOCKING ARROW LIFTS!
 * 2) TOP O' THE TOWN
 * 3) SECRETS IN THE SHALLOWS AND SKY
 * 4) EXPRESS ELEVATOR--HURRY UP!
 * 5) GO TO THE TOWN FOR RED COINS
 * 6) QUICK RACE THROUGH DOWNTOWN
 * 7) 100 COIN STAR

Negative Emotional Aura
Several people have reported feeling discomfort inside of this level. It is believed this could be due to this level's bizarre nature in comparison to other courses in the game, and the strange downtown area.

WDW Skybox
Wet-Dry World has a unique skybox of an underwater town with the sun shining through the water. This image is actually an image of a town in Spain known as Casares, though the image is edited to appear underwater.

Brain Diagram
Discovered by The Cutting Room Floor, there is an image of a human brain in the assets of Wet-Dry World. It appears to have originally been the painting of the level due to the border around the image. It is believed this brain diagram was used as a base when designing this level.

Reused Assets
Some assets from the beta of The Legend Of Zelda: Ocarina Of Time, originally known as Zelda 64, appear to have been reused in this level. Notably, this level is referred to in the files of Super Mario 64 as "ZLDCITY", backing up this theory.

Brain Simulation
It is believed that Wet-Dry World is actually a simulation of a brain, functioning as the brain of the Personalization A.I. The water represents hydrocephalus, a condition where fluid ends up in the brain's ventricles. The path leading to the downtown area also appears similar to a vein, and the downtown area itself is believed to represent the subconcious. It is also believed the Brain Diagram was used as a base for this level due to the Brain Simulation theory, and that the Negative Emotional Aura is an effect of the Brain Simulation.