As you walk into Germany, check out the interior of the shops to your left. Start in the wine shop and walk toward World Showcase Lagoon. You'll notice that the first room is designed to look like you're in the basement, then in the next, adjoining shop, you're on the first floor in the kitchen, then in the living room. As you keep making your way toward World Showcase Lagoon, you'll eventually be in the attic -- complete with squeaky floor boards.
In England, consider the name of the restaurant and look at its sign closely. Not many people knew how to read and write back in the day, so the pub had a name that could be found without knowing how to read -- the sign has a picture of a rose and a crown to denote the name of the restaurant.
In England, take a look at the pattern in the pavement. It's made to represent where the gutters would have been.
In China, the shops and the courtyard around those shops are quite small, yet the Reflections of China movie lets out right into them. Everyone forces their way into the shops and courtyard at once, and it becomes quite crowded... like an actual market in China. This was actually planned.
In France, forced perspective is used to make the Eifel Tower appear to be in the distance. In reality, it's quite small. It's coated in a gooey substance to keep birds from landing on it, because if they did, it would look like an attack of a Godzilla-sized bird.
The bell tower in Italy is a replica of the actual tower in St Mark's square. However, if you were to travel to the actual St Mark's square, you'd notice that the one in Epcot is on the wrong side of the square. (Oops.)
In Morocco, look very closely at all the intricate tile designs on walls, fountains, and the like. In every single one, you'll find a mistake -- a tile or piece that doesn't seem to match the pattern. This is done deliberately by the Moroccan artisans who were flown in to do the tilework, because only Allah can achieve perfection.
In China, you'll find statues of two dragons sitting side by side. If you look closely, you'll be able to tell which is the male dragon and which is the female. No, they're not anatomically correct! The male dragon has his paw resting on a ball -- representing the flower of life. Under the female's paw is a baby dragon.
Forced perspective is used throughout Disney World. In the Magic Kingdom, it's used to make the castle and buildings on Main Street look bigger than they really are. The same is true of the Eiffel Tower in France, as I've already mentioned. However, the American Adventure Pavilion is one example of forced perspective being used in the opposite manner. Take a look at the size of the windows on the first floor of the pavilion -- they're huge. As they go up, they get smaller. This is done because the size required for the theater is much larger than the colonial-style buildings the pavilion is made to resemble would have ever been. In this case, forced perspective is used to make a five story building look like a two story building.
Only three pavilions in the World Showcase have locations that were chosen for a specific purpose. The American Adventure Pavilion was obviously placed in the center of Epcot to make it the centerpiece. Mexico and Canada were the other two specifically placed. Can you guess why? As you leave Future World and enter the World showcase, you're "leaving" Florida and the United States. When you do that, you cross the border into one of the two countries that share a border with the continental United States -- Canada or Mexico.
Back stage tours are so much fun -- you learn all kinds of neat trivia like this. I'm sure I heard more, but this is what came back to me on the fly.