Aha, you all were expecting something else? For the last day, I choose ALL of Epcot. A whole park you can't find anywhere else! Of course, the first thing people think of when they hear Epcot is the iconic geodesic sphere housing the Spaceship Earth attraction. I know it's the first thing I think of.
Epcot is divided into two parts: Future World, consisting of most of the ride-based attractions in the park featuring primarily science and technology; and World Showcase, featuring 11 pavilions representing countries from around the globe. The pavilions of the World Showcase span around the aptly-named World Showcase Lagoon. What I love about it is that Disney has done such an amazing job theming each country, it's almost as if you've taken a small trip around the world. Most of the countries have at least one attraction, though most of them are some sort of interesting movie-based show, most are pretty good. Though, no doubt by design, the United States pavilion is at the center of the showcase, and contains I believe the best attraction in the showcase, an show featuring an audio-animatronic history of the US entitled "The American Adventure". Or as I also like to call it "the best 30 minutes of air conditioning you'll find in Epcot."
Disney is also known for its spectacular nighttime shows, and Epcot has one of the finest in IllumiNations: Reflections of Earth. Fireworks, lasers, fire, and water, all synchronized to another amazing soundtrack. (Hey, I'm a musician, a good soundtrack means a lot to me.)
Tonight I'm on the redeye out of Seattle (with an intentionally ugly layover to coordinate flight times), so I'll be in Florida by morning. Updates to follow later.