Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

This symbol of peace is appropriately positioned overlooking the Pacific Ocean.

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

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

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

Spiral labyrinth hidden in the hills above Oakland, CA.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

Ancient human, animal, and geometric figures drawn in the earth.

Along a California highway is a kind of Jurassic Park made of metal.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

A Mysterious Masonic tomb in San Luis Obispo.

The location of the last stand of Charles Manson's doomsday cult.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

The haunting ruins of Jack London's dream house.

A world-class observatory in the California desert.

This impressive tunnel was dug entirely by hand over the course of 36 years.

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

The mysterious round rocks of Schooner Gulch.

From Japan to Italy, this California park explores the world's cultures through their gardens.

A popular tourist cave with a dark past.

A large instrument played by the wind.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

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