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

These six walrus head statues harken back to a time when this area wasn't far from the oceanfront.

A shining, cold, black organ lies in San Francisco's financial district.

This tall and trim architectural oddity is one of the skinniest buildings in San Francisco.

Home of modern dancer famously strangled by her own scarf.

Where a demonstration led to equal rights for one of California's most marginalized communities.

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

Its buzzing collection honors vibrator history.

This giant head is all that remains of a once proud statue that survived an earthquake but not a fall off of a wagon.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

Concrete strongholds stand guard over the Golden Gate.

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.

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

A monument to the love people have for their pets.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Guns that have been defending San Francisco since 1904.

This sailor's boneyard was lost under a parking lot for decades before being rediscovered.

One of the smallest parks in San Francisco honors the legacy of the "Mother of Civil Rights in California."

27-room home built with the fortune of a sugar magnate.