Cities of the Underworld (2007)

S3E10 Under the Rock

Often seen as a sanctuary for free-spirited individuals, San Francisco hides a darker reality as one of the nation's major military defense sites. Join us as we venture beneath the charming hills to reveal the largest munitions depot on the West Coast, exploring a perilous cache that once held nuclear missiles with over six times the destructive capacity of the Hiroshima bomb. From the hidden Civil War stronghold under Alcatraz to the clandestine tunnels for human trafficking lurking beneath Chinatown, the city's underground reveals a troubling history.