A popular tourist cave with a dark past.

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

Spiral labyrinth hidden in the hills above Oakland, CA.

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

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

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

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

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

The most beautiful Taco Bell in the world even has surfboard parking.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

The fossilized remains of ancient California redwoods.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

An optical illusion found amid a logged redwood forest.

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

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

An L.A. traffic island where the faces of locals have been carved into massive granite eggs.

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

An old California photo stand has been turned into a shrine to the cozy art of crochet.

Located on 420 acres in the high desert, this spiritual center is dedicated to the "science of the future."

This sculpture garden in Death Valley makes you feel like you've slipped into some alternate reality.

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

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

This Hollywood dive houses a mural painted by the artists who animated its namesake film.