San Francisco City Guides Walking Tours 

As a self-described "logical extension of a free public library," our local free walking-tour company is, like most libraries, a fascinating mash of nerdy and white-hot rad. The San Francisco City Guides walking tours happen every day (except major holidays), are free, and follow in the footsteps of hypereducated history nuts who hand out copies of secret, illuminating documents while pointing out the beauty all around us. What's more, in the best-weather months of May and October, the Guides offer extra tours, bringing the weekly count up to 114. Six tours are offered today: Palace Hotel, Russian Hill Stairways, Castro: Tales of the Village, Pacific Heights Mansions, Ferry Building, and Market Street: Path of Gold. The Diego Rivera tour, offered Mondays, is one of our favorites — the City Club (formerly the Stock Exchange building) at 155 Sansome is normally closed to the public; the mural, Allegory of California, is pure weird radiant Rivera sorcery. — By Hiya Swanhuyser

Website: http://www.sfcityguides.org

Price: free