Falls of Truth

The, located on an island in the Land of Lightning, is the place where Killer Bee trained to control the Eight-Tailed Giant Ox. It is a mysterious place where by sitting on the platform at the base of the falls, and concentrating the falls transport one into the inner world of the mind. Once there the falls becomes a mirror which reflects one's true self. Naruto is trying to control the Nine-Tailed Demon Fox at the Falls of Truth by defeating his dark self.