San Quentin State Prison
Don tours a horrific punishment cellblock called 'the Dungeon' in the oldest public building in California. Fear of this brutal place helped restore law and order in the wild Gold Rush boomtown that was San Francisco in the 1850s.
In its heyday, it was the Byron Hot Springs Hotel. But during WWII this place was Camp Tracy, a top-secret facility used to interrogate Japanese POWs.
Once the greatest shipyard on the West Coast, it employed 16,000 men and women at its peak, when San Francisco was a blue-collar town.