Piedras Negras

Piedras Negras was formerly named Ciudad Porfirio Diaz. After Diaz was defeated, the city was renamed.

Piedras Negras lies on the border between Mexico and the United States. Piedras Negras literally translates as "black rocks", a testament to the coal mines that exist there. Before and during the Mexican Revolution, the United States took advantage of the natural resources along the Mexican border. This discontented much of the population.