If you are truly interested in discovering a few "secrets" about Walt Disney World (Florida) there are some great behind-the-scenes tours available. Backstage Magic goes backstage at the Magic Kingdom, Epcot, & Disney's Hollywood Studios. You get 7 hours of Disney "Insider" knowledge and see really cool stuff like the "tunnels" under the Magic Kingdom (Utilidors), the maintenance area at Tower of Terror, their manufacturing facility (Central Shops) and SO MUCH MORE!
At Disneyland (California), they also have guided tours with great insider information but they spend more time on-stage and basically none backstage.
Either way, you get some great glimpses into the magic of Disney.