Category: California

Listing places of interest located in California.

Black Diamond Mines

California may not be the first state that comes to mind when contemplating coal mining, yet coal was a critical energy resource for the fledgling state.  The Mount Diablo Coalfield in California’s east bay produced over four million tons of coal between 1850 and 1906. Today, it is a 6,000-acre park encompassing 5 ghost towns and twelve closed coal mines. Before rail spanned…