Here's some Epcot ones:
Don't know if this is absolutely true (I'm sure someone out there can verify) but I once read somewhere that one of the reasons they closed Horizons was because the building was structurally unsound and possibly sinking into the ground.
But this I KNOW is true--in the queue for Mission: SPACE, there's a big space-wheel thing (can't tell you the technical term) and in the center is the old Horizons logo.
I posted this somewhere else too:
In MouseGear, high up on the wall facing the row of cash registers (above the section where they have the pens/pencils and those photo acrylic thingys) is one of the "flying machines" from the opening scene of the original Journey into Imagination, minus its balloon and with a different paint job (and with no Dreamfinder, of course). Originally there were three, who knows what happened to the other two.
The Imagination! pavilion was originally supposed to be the Land pavilion at one point (hence, the glass pyramids--like a greenhouse).
And one more:
The attractions in Future World East and West are grouped with a purpose: the ones in East all have to do with more "left-brained" or hard sciences: energy, space, and transportation, while the ones in West are more "right-brained" or have to do with nature: agriculture, the seas, and imagination. The landscaping, flower beds, all reflect this: the ones in West feature water and curving lines while the ones in East are angular and hard-edged.
Poor Cindy. 
