Ciudad Juarez, Mexico

Clockwise, from the upper left:  the post office and downtown view, the train station and the Hotel Rio Bravo, the Cruz Blanca "cerveceria" (I know you all know what that means even if you don't speak Spanish), and the race track, from a series of photographs by Roberto Lopez Diaz of Ciudad Juarez in the state of Chihuahua, Mexico probably from late 1950s/early 1960s. 

If you search Ciudad Juarez now, it is defined as both one of the fastest growing cities in the world and "the most violent zone in the world outside of declared war zones."  These postcards reflect a more innocent time.