A historic hotel in an old California railroad town with a rowdy reputation.

The remains of a ruined mansion memorialize the 1906 earthquake.

Floating man-made island and upscale restaurant.

Built in 1906, this unique building was the first Hindu temple in the United States.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

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

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

Guns that have been defending San Francisco since 1904.

A monument to the love people have for their pets.

The remains of a deserted steamboat sit rusting beside an old ferry pier and an abandoned train platform.

Internationally-recognized arts center housed in a century-old former military barracks.

Concrete strongholds stand guard over the Golden Gate.

One of the last remaining Carpenter Gothic churches is situated on a wildflower conservatory overlooking the bay.

The former Naval shipyard is open for exploring - mostly.

At night, a grove of towering redwood trees growing through the pavement block out all light from the so-called “Dark Park” of Madrone Avenue.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

This abandoned boat was left in place thanks to its rotting beauty.

The southernmost outpost of the Russian Empire in colonial America.

The fossilized remains of ancient California redwoods.

Preserving the remains of Native American cultures which otherwise would have been submerged behind Hoover Dam.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

The world's first clock to use set theory as a measure of time required the invention of a new light bulb just to maintain its obtuse measurements.

This hulking behemoth is actually five interconnected towers built in the 1960s.