Spaceship Earth is a track ride in Future World - Spaceship Earth at Epcot. While it's not the best, it is also recommended.
Epcot's signature attraction, Spaceship Earth is a massive "geosphere" that stands above the entrance plaza to the park. Inside is a slow-moving ride depicting the history of communication, from ancient cave paintings to Hewlett and Packard building computers in their San Jose, California-area garage. Crowds pack the ride early in the morning, as it's the obvious first thing to do when you enter the park. Wait until later to ride, though, and you'll walk on with little or no wait.
Walt Disney World