The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

The site of murders and Satanic cult gatherings.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

The longest burning light bulb in the world.

A ruined hotel with an unlucky history and an eerie present.

This corn maze so big you may want to pack a lunch, and possibly a flaregun.

I Street Bridge is the heaviest swinging center bridge in the United States.

The California capital city once stood 10 feet lower than it does today.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

A Mysterious Masonic tomb in San Luis Obispo.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

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

Spiral labyrinth hidden in the hills above Oakland, CA.

The mysterious round rocks of Schooner Gulch.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

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

A house built from trash known as the poor man's Hearst Castle.

The haunting ruins of Jack London's dream house.

The ruins of the castle that chemicals built.

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

A popular tourist cave with a dark past.

"Only the devil could play golf here."