The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

The first permanent memorial to a unique secret weapon of World War II.

This small, unassuming street is now a canvas for color and creativity.

Condemned US Navy seaplane control tower turned officers’ club sits atop Yerba Buena Island.

Furniture tries to escape an abandoned building in San Francisco.

This contorting sculpture is the tallest in San Francisco.

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

This Japanese treats shop may have been the first business to mass-produce fortune cookies in the United States.

This surreptitious shop is only open five hours per week.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

One time home to turn of the century explosives, now hidden under the Bay Bridge.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.

Guns that have been defending San Francisco since 1904.

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

A free, public museum dedicated to the fascinating science of sight.

Reverend Franzo Wayne King administers spiritual enlightenment through the music of the jazz legend.

A brooding mansion of clinker brick stands out among the Victorian houses of Pacific Heights.

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

Russian history in San Francisco.

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

A Barbary Coast watering hole built into a Gold Rush shipwreck.

Golden Gate Park's historic collection of plants.

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

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.