Kansas is in the Corn Belt, a very large flat place where American farmers grow lots and lots of corn.
Corn Belt: Public domain image |
640px-Corn_fields_near_Royal,_Illinois CC-BY-SA |
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A cyclone (most Americans now say tornado) brings Dorothy to the Land of Oz, a place where there are many trees and beautiful flowers (not like Kansas, which is very flat and boring).
When Dorothy opens the door, she says "We're not in Kansas anymore." = This is a very strange place. I'm not sure what we should do.
"We're not in Kansas anymore" is used in book titles (how to make money), blog titles (investment), news headlines, and song titles: