The haunting ruins of Jack London's dream house.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

The ruins of the castle that chemicals built.

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

"Only the devil could play golf here."

A popular tourist cave with a dark past.

The liveliest ghost town in the state.

Inside an old airplane hangar, friends and strangers alike play on a massive trampoline.

Gold Rush-era tombstones line the park's paths.

Home to the "Circus" trees created by Axel Erlandson.

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

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

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

Los Angeles's oldest cemetery allows visitors to trace the history of this proud city.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

The famous animator's private station house and man-cave was the birthplace of imagineering.

One of the most unusual geological features, recognizable from a dozen hit movies.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

Golden Gate Park's historic collection of plants.

This traditional garden in the San Fernando Valley doubled for Star Fleet Academy, and is irrigated entirely by wastewater.

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

A former utopian healing center created by a huckster and built by derelicts.

Commonly referred to as the most photographed Victorian home in the United States.