Disney’s Magic Kingdom Park is the most visited theme park in the world with over 18 million visitors per year. It’s also the theme park the springs to mind when thinking of Walt Disney World. It’s the park with Cinderella Castle, Main Street U.S.A., beautiful shops, countless characters, Big Thunder Mountain, Space Mountain and the Jungle Cruise. It’s quintessential Disney. It was the first of the parks to be built at Walt Disney World and opened on October 1st, 1971.