Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

A rough granite monument marks the spot where Europeans first caught sight of the San Francisco Bay.

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

A B&B on a Victorian lighthouse station in San Francisco Bay.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A promotional sun clock on the site of San Francisco's great raceway.

A 300-ship graveyard, with a few still visible at low tide.

A winding path built in secret on the edge of the continent.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

The remains of a ruined mansion memorialize the 1906 earthquake.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

A pair of slides and a tree-lined stair corridor have been an urban oasis for nearly 40 years.

A psychedelic labyrinth on the San Francisco bay.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”