We have discussed a few times on this site about how the addition of plant life helps disguise the real world from a guest's view while walking throughout the parks. One of these instances can be found over at Dinoland, USA at the attraction Dinosaur.

The storyline of Dinosaur focuses on the guests traveling back in time to retrieve an Iguanodon. Naturally, due to this storyline, the Dino Institute is just a small building, therefore, the show building that houses the attraction does not exist in our world whatsoever.

To help create this illusion, Imagineers went back to a technique they developed in the 1960s once It's a Small World returned from the 1964 World's Fair. They placed trees on top of the Dino Institute to make the building appear much smaller than it actually is. Take a look at the picture below where the trees appear to be approaching from behind the building instead of actually being placed on top of it!