Worlds in Kingdom Hearts 3D: Dream Drop Distance are areas that serve as the levels of the game. Each world is either based on an existing Disney movie property, or is an original Kingdom Hearts property.
Castle Oblivion - Country of the Musketeers - Destiny Islands - Disney Castle - Dive to the Heart - La Cité des Cloches - Prankster's Paradise - Sleeping Worlds - Symphony of Sorcery - The Grid - The Mysterious Tower - The World That Never Was - Traverse Town