Playable, historic pinball machines fill this Alameda museum.

This mysterious series of teeny guerrilla installations sheds a whimsical light on street art in Oakland.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

Once the fastest ship from San Francisco to Tahiti, the Galilee now lays in pieces in three different cities.

The taxidermied remains of the "last wild grizzly bear in California" and of the symbol of the state of California.

A monumental cross hides in the trees in Golden Gate Park.

Concrete strongholds stand guard over the Golden Gate.

America's most famous piece of self-built architecture.

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

A glimpse into the lives of the the Miwok and Paiute people in Yosemite National Park.

A store that sells all manner of bones, insects, and animal curiosities.

Oakland's beautiful monumental cemetery.

An artsy hidden staircase leads to breathtaking views of San Francisco.

This turn of the century masterpiece has a mysterious goaty interloper.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

A quiet marker in memory of local men and women lost in WWI.

The restored and active Victorian-era final resting place of San Francisco.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

San Francisco's newly reopened hands-on science museum.

Its buzzing collection honors vibrator history.

A modern mechanical planetary system, part of a 10,000 year clock.