For a woman traveling without her husband in the late 19th century, there was only one reason to take the train all the way to Sioux Falls, South Dakota: divorce. With the laxest divorce laws in the country and the finest hotel for hundreds of miles, the small city became infamous around the world as the Divorce Colony. While surveying this tense moment of cultural change in American history, April White profiles four fascinating women and shares some of the social, political, and personal dramas that unfolded in Sioux Falls.