From SFWiki

There are free factory tours throughout the Bay Area and in nearby areas.

Treats and other Food

• Jelly Belly Factory Tour: Herman Goelitz Candy, in Fairfield

• Golden Gate Fortune Cookie Company

• Boudin at the Wharf

Beverages

• Sake Tour

• Anheuser-Busch in Fairfield

• Anchor Brewing

Other

• The Basic Brown Bear Factory

• Benicia Glass Studios

• Heath Ceramics- in Sausalito

• Museum Guide
• Cheap Stuff To Do