Eons old volcanic activity created one of the most stunning rock formations in the United States.

This hidden fire lookout offers spectacular views of Sequoia National Park.

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

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Guns that have been defending San Francisco since 1904.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

This private residence was the template for one of the most beloved television homes of all time.

A 300-ship graveyard, with a few still visible at low tide.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A psychedelic labyrinth on the San Francisco bay.