The Wave Organ: A Free San Francisco Artwork You Have to Time With the Tides
San Francisco's Free Museum Where the Cable Is Still Moving
SF Free Museum Nights and Cheap Eats in the Mission
Free Mornings at the Ferry Building Farmers Market
Free Bison Paddock and Hidden Gardens in Golden Gate Park
Free Lands End Coastal Trail and Sutro Baths Ruins
Golden Gate Park Bison Paddock Perimeter and Spreckels Lake Wind Loop: A Fresh Field Note
San Francisco Maritime National Historical Park Hyde Street Pier and Deck Walk: A Fresh Field Note
Walking the Presidio's Battery Trail When the Fog Rolls In
Golden Gate Park to Ocean Beach: SF's Best Free Day Out
Ask Karpo for more information.