In a particular scene of the Wizard of Oz, Dorothy is conversing with some eccentrics after having been propelled by a cyclone into a strange territory, a land of foreign, yet blooming earth. Dorothy, when told of the City of Emeralds where the Great Wizard is, (as he is her only hope of returning home) decides to take the leap. How can I get there? she asks. You must walk, replies the good witch, the Witch of the North. It is a long journey through a country that is sometimes pleasant and sometimes dark and terrible.