A hidden world of exotic succulents and cacti.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

A humble garage, world-famous for being the epicenter of a technology revolution.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

One of the oldest adobe structures in Northern California.

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

For roadside fast food, pull over at the giant orange.

The longest burning light bulb in the world.

This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

Bonsai garden in Oakland is curated by the first non-Japanese female bonsai master in the United States.

A restored 1920s cascade stairway provides one of the best views of Oakland's Lake Merritt.

A creepy steel gremlin has protected the Bay Bridge since 1989.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

Curious cave that stays a cool 56 degrees all year long.

Lone survivor from Custer's Last Stand forever preserved.

A huge musical instrument played by the ocean.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

The abandoned personal amusement park of the King of Pop.

The oldest pictographs on this decorated rock formation in California's Carrizo Plain date back as many as 4,000 years.

This massive statue of John Muir on the side of a California highway was carved from a redwood tree.

This small shack near the entrance to Sequoia National Park has been in almost continuous operation for the last century.

Four hundred granite steps were built into this massive rock by the National Park Service.