In order to make things more distinct and not be a mere copy of the original, modifications were made to the park's concepts and designs. Among the changes was the change of Tomorrowland to Discoveryland, giving the area a retrofuturistic theme. Other altered elements include the Haunted Mansion, which was redesigned as Phantom Manor and a retro, more intense version of (now Hyperspace Mountain). The park's location brought forth its own challenges. Sleeping Beauty Castle (Le Château de la Belle au Bois Dormant) is said by its designers to have been necessarily reevaluated for a continent on which authentic castles stand. Modifications to the park were made to protect against changes in weather in the Parisian climate. Covered walkways referred to as "arcades" were added, and Michael Eisner ordered the installation of 35 fireplaces in hotels and restaurants.