On June 1, 1881, Denver's Union Station opened as the largest structure west of the Mississippi. The station welcomed people from all walks of life, from pioneers and miners to U.S. presidents and Buffalo Bill Cody--and even royalty from abroad. It served as the center point for transporting cargo to Denver before the rise in popularity of air travel. Due to revitalization efforts, Union Station is the centerpiece of the nation's largest transportation hub and the pride of the city. Author Rhonda Beck explores the history and stories behind one of the Mile High City's most iconic historic landmarks.