Battery Townsley gun 1

Armed with two 16-inch guns in 1939 in preparation for World War II, Battery Townsley, located in the Marin Headlands just north and west of San Francisco, was meant to give the U.S. military a 25-mile range for shooting incoming attackers.

The gun areas were covered by giant cement casemates intended to protect the guns from aerial attack. One of the big guns was mounted here, though it has long since been taken away.