For ages, the Great Plains rolling hills and immense grasslands have been home to adventurers, artists, and outlaws, from legendary Sioux warriors Crazy Horse and Sitting Bull to Jesse James and Mark Twain. The Great Plains, which stretch west from Missouri, Oklahoma, Kansas, Nebraska, Iowa, South Dakota, and North Dakota, are frequently described as an expanse of uniformly flat corn fields, the "flyover states" of conservative "Middle American" beliefs.