In the Rocky Mountain West, Denver is considered the big city. Yet its urban core consists of numerous neighborhoods developed in the late 19th century that act today as virtual small towns. South-central Denver's Washington Park is one of those "small towns," and its name refers both to a 166-acre historic park and to the surrounding blend of residential and commercial neighborhoods. Cited as a model for new urbanism, this area serves as an enduring example of the City Beautiful movement. Touted in the late 19th century for its "rapid transit," clean air, and pure water, the area once known...