Princess's Secret Slide

The Princess's Secret Slide is a secret area in Super Mario 64. It is hidden in a stained-glass window with a picture of Princess Peach. This area is a long, orange slide in which Mario must slide to the end to get a Star. There is also another secret Star hidden in here. If Mario completes this area within a certain time limit, a bonus Star will be uncovered.

Princess's Secret Slide also makes it's reappearance in Super Mario 64 DS. In adventure mode, it has essentially the same features, but it also appeared as a battle course.