A replica of the first public theater built in California.

Art Deco stylings conceal the true nature of this bridge.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

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

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.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

A promotional sun clock on the site of San Francisco's great raceway.

This private residence was the template for one of the most beloved television homes of all time.

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Floating man-made island and upscale restaurant.

These subterranean storage areas hold emergency water reserves.

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

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

The miraculous hydrant that saved the Mission District in 1906.

A private home built to resemble the shape of a microscopic creature.

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

Every Sunday, this Thai temple in Berkeley serves a backyard brunch.

This controversial depiction of the "Founder of California" looks as though it was sculpted from mashed potatoes.