Born and raised in California, I am a huge fan of my home state's ecological diversity. The movie industry loves this variety too, which is part of the reason they found such a great home in Los Angeles.
This map is a great visualization of how Paramount Studios broke down the local ecosystems for filming back in 1927. I bet you never knew that Spain, Mississippi, Siberia and New England are all hidden within the Golden State.
Of course, now they usually travel to make movies more authentic. But then again, your favorite television show may still be filmed in Fake Switzerland near Lake Tahoe.