The actual cost of the Harry Potter and the Forbidden Journey attraction is somewhere between $150 million and $200 million. The attraction, with incredible innovation and fairly lengthy ride time, is considered the best dark ride in the world.The Wizarding World of Harry Potter drew critical acclaim when it was unveiled in 2010. The main focus of the theme is Hogwarts castle. The ride takes you through the Wizarding World and a qudditch match with scores of beasts including dragons, dementors and giant spiders making their appearance on the way. The Whopping Willow appears as well.The high cost of construction of the attraction is due to the seats that are mounted on top of a KUKA robot arm and the mechanism that help the seats move in every direction and flip riders upside down even as the track stays flat.