Enterance~ An Old Muggle Telephone Booth Enter And Then Press 62442 And A Witch Askes Your Name & Business Being There. 

 Level One
Level Two    Department of Magical Law Enforcement
Level Three Department of Magical Accidents and Catastrophes
Level Four   Department for the Regulation and Control of Magical       Level Five    Department of International Magical Cooperation
Level Six      Department of Magical Transport
Level Seven Department Of Magical Sports & Games
Level Eight   Atrium~Visitor's Enterance
Level Nine   Department Of Mysteries-Courtrooms

Departments

Department of Magical Games and Sports
Department Head: Ludo Bagman Jr.
Members: Bertha Jorkins (Deceased)
Purpose: To Organize and Promote Wizard Games

Department of Magical Catastrophes (No Information)

Department of Accidental Magic Reversal
Emergencies For Wizards In Training.
Purpose: To reverse spells and repair damage done by spells that went wrong.

Improper Use of Magic Office: Members: Mafalda Hopkirk

Misuse of Muggle Artifacts Office
Members: Arthur Weasley, Perkins. The Purpose: To prevent enchanted items from getting into the hands of muggles.

Committee Of Experimental Charms
Members: Gilbert Whimple
Purpose: To experiment with new charms or spells.

Department of International Magical Cooperation
Head:Senior Bartemius Crouch (Deceased)                              Members: Percy Weasley
Purpose: Sort of the foreign minister for the UK, To Keep Peace Between The Two Nations.

Department of Magical Law Enforcement

Department of Magical Transportation
Purpose: Regulates magic folk transportation. Organized Portkeys and Transportation for the Quidditch World Cup.

Department for the Regulation and Control of Magical Creatures
Members: Amos Diggory
Purpose: To control and regulate magical creatures.

Department of Mysteries
Members: Bode and Croaker, Augustus Rookwood (Deceased)