Description: A large, iron dungeon door is locked.

Description: A large, iron dungeon door is locked.

Description: Lowering of a wooden drawbridge.

Description: Sliding sound of a secret magical door.

Description: Large stone sliding door opens revealing large cave ambiance.

Description: A futuristic sliding door in big space.

Description: Futuristic hatch Door closing

Description: Opening and closing of futuristic airlock door.

Description: Opening and closing of futuristic airlock door.

Description: Automatic opening and closing doors with people passing through in public building.