The Castle's Fourth Floor

The fourth floor of Super Mario 64 is a floor in Princess Peach's Castle that is only present in the 1995/07/29 Build of Super Mario 64. Not much of the fourth floor is known. This is the only photo that has been discovered at the moment. From the top part of the ceiling, it's safe to assume that this would be the top floor because of the hole that would be one of the towers at the top of the castle but that's far from the case. There is also a rumored Fifth Floor but no photographic evidence has been shown yet except for an image with Big Chungus. The photo shows what looks like a wide exit to the castle down a long hallway and a door to the left. There is probably another door from where the camera is positioned but that is not confirmed.

Entrances

You can find it in your copy of Mario 64 personalized if you have the judgement star in the final part of the Peach's Castle but this may make the build crash.

 Origin 

Although it is not confirmed, the creator of the image could be from where most people originally saw it. A YouTube video by Flargee is a roughly 3 minute long video of this image with chilling music the link can be found by clicking here. The Video Has Since Be Deleted.

 References 

https://www.youtube.com/watch?v=GSDNGn738ZA

https://www.youtube.com/watch?v=HUyu3mP8A5k&feature=youtu.be

StarCapCup64: https://youtu.be/4c-9cNSmb7I