Tomorrowland Transit Authority PeopleMover is a track ride in Tomorrowland at Walt Disney World's Magic Kingdom. While it's not the best, it is also recommended.
Originally called the WEDway PeopleMover, this prototype of a linear induction-powered mass-transit system carries riders on a leisurely tour around the rooftops of Tomorrowland. (Walt Disney's middle name was Elias, so W.E.D. were his initials.) Walt Disney envisioned the PeopleMover as a public transit system for the city of the future that he wanted to build in Disney World, on the site of what became the Epcot theme park years after his death. Keep your eyes open while you ride to see a fragment of the original model for that city.