A monumental cross hides in the trees in Golden Gate Park.

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

A miniature view of the park, caught in time.

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

Faceless white figures loom over the city from the rooftop.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

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

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Recovered from the brink of extinction, at home in the Financial District.

One of few lasting examples of the brief octagon craze that developed into folly.

Barely visible foundations remain where Stow Lake’s “observatory” once welcomed visitors.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

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

A man-made island in scenic San Francisco Bay.

The miraculous hydrant that saved the Mission District in 1906.

A giant donut stands as a popular symbol of Los Angeles iconography.

Storybook cottage in Beverly Hills was once the site of 1920s silent film studio, affectionately known as "The Witch's House."

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

A large instrument played by the wind.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

Golden Gate Park's historic collection of plants.

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

This turn of the century masterpiece has a mysterious goaty interloper.