The Mind of a Madman

The Mind of a Madman is a location in centred around the mind of the deceased Emperor of the Septim Empire Pelagius Septim III. The Dragonborn is sent to this location during the quest "The Mind of a Madman" in which he must repair Pelagius' tormented mind.

The Mind of Madness
The Dragonborn is transported to the Mind of a Madman by Sheogorath and is asked to repair the mind of Pelagius Septim III with the use of the Wabbajack.

Trivia

 * It is impossible to access the inventory or magic menus while the Dragonborn is in this location and, thus, no magic or items can be equipped.

Bugs

 * It is possible that a dragon may spawn and likely kill the Dragonborn as they cannot land and the Dragonborn cannot equip any weapons or magic to defeat it.
 * Selecting the dragon in the console and entering the command  will effectively 'kill' the dragon. The console command   does not work on dragons.