A historic office and commercial building located in the heart of downtown San Francisco.

Wander down a side street dedicated to one of the members of the Beat Generation.

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

A hidden subterranean installation offers a view of the sky.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

A classic advertising icon immortalized in regal bronze.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

A mysterious painting of the self-declared Emperor of the United States watches over a local hof-brau.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Olfactory delights in San Francisco's Botanical Gardens.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

Part mural and part sculpture, this work of art sits in the middle of the Promenade, as if swimming in a river of asphalt towards the ocean.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A miniature view of the park, caught in time.

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

The remains of a 12th-century chapter house in Golden Gate Park.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Small and slightly hidden, the American Writers Museum is preserving the legacy of America's finest authors.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.