The headquarters of a secretive order is also a beautifully-designed park.

Neoclassical Revival mansion and set of horror cult classic Phantasm.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

A man-made island in scenic San Francisco Bay.

California's own majestic geyser is powered by a subterranean volcano.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

The haunting ruins of Jack London's dream house.

A popular tourist cave with a dark past.

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

A cozy bookstore is tucked within an old gold mine shaft beneath the cafe and ice cream shop.

A still functioning vaudeville carousel that has operated for over a century boasts a colorful menagerie and past.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

A public fountain that spouts "health water" from a nearby spring.

Only known mainland rookery of the threatened Stellar sea lion.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A collection of colorful dinosaurs hidden in an actual rainforest.

A tourist attraction founded around a slumping cabin.

Two mammoth statues inspired by equally tall tales lure tourists to this roadside attraction.

This Taoist temple is the oldest continuously used Chinese temple in California.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

This monster board rode a monster wave to break two world records.

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