Categories Heritage Sites Architecture 4th Street Post Office 120 4th Street website Get directions Iron Front Row 9 Western Avenue website Get directions Linch Building 10 Western website Get directions Main Street Post Office 6 Petaluma Blvd North Get directions Odd Fellows Hall 111 Petaluma Blvd North website Get directions Sonoma County Bank Building 199 Petaluma Blvd North website Get directions Culture Hill Opera House/Phoenix Theater 201 Washington Street website Get directions Mystic Theatre and McNear Building website Get directions Old Opera House 145 Kentucky St website Get directions Egg Basket Former Site of Byce's Incubator 271 Petaluma Blvd. North Get directions Must Hatch Hatchery website Get directions Fertile Ground Helen Putnam Regional Park 411 Chileno Valley Road website Get directions Putnam Plaza Park Get directions Steiger Building Get directions Water Street Get directions Founding Mothers Carnegie Library / Petaluma Historical Library & Museum Get directions Herold Building Get directions Hill (Penry) Park 226 Kentucky Street website Get directions Historic Petaluma Woman's Club Get directions Petaluma Woman's Club 518 B Street website Get directions WCTU Water Fountain Get directions Homes 10 Keller Street Get directions 504 D Street Get directions 523 B Street Get directions 600 D Street Get directions Industry Dairyman's Feed Mill 323 East Washington Street website Get directions Foundry Wharf Get directions Historic Petaluma Creamery 621 Western Ave website Get directions Historic Petaluma Hotel Get directions Hunt & Behrens Get directions Silk Mill 420 Jefferson Street website Get directions Train Depot & Visitor's Center 210 Lakeville Street, 707.769.0429 website Get directions The River Balshaw Bridge Get directions D Street Drawbridge Get directions David Yearsley River Heritage Center 100 East D Street website Get directions Hitoric Warehouse District First and Second Street website Get directions The Trestle 103 Water Street website Get directions