This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

A classically inspired temple in Redwood City.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

A Roman-inspired temple once controlled half of San Francisco's waters.

This quaint archive of the silent era preserves and pays homage to a seminal moment in film history.

This enormous World War II relic is one of the largest wooden structures in the world.

A monthly street "service" of handmade puppets and live original puppets, whose devotees profess has the power to change lives.

Faceless white figures loom over the city from the rooftop.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The most beautiful Taco Bell in the world even has surfboard parking.

Finally the worlds of UFO enthusiasts and beef jerky lovers have come together in this roadside shop.

Huge otherworldly domed rocks on the shore of a deadly lake.

A "haunted" landmark on the coast of Southern California.

Rare collectibles from automated musical instruments to 250 unique automobiles.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

Russian history in San Francisco.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

The liveliest ghost town in the state.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

This massive redwood tree has a hole in the base big enough to drive through.

Explore 10 acres of environmental sculptures.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.