A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

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

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

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

It is locally loved and ridiculed for literally looking like poop.

It took years to decode its mysterious messages.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The oldest house in the capital of Silicon Valley.

An extensive collection of ancient Egyptian artifacts and mummies.

The long, arduous journey of the stones of the Abbey of New Clairvaux.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

An alley covered with 20 years of bubble gum.

The California capital city once stood 10 feet lower than it does today.

Playable, historic pinball machines fill this Alameda museum.

Every year, over 25,000 monarchs overwinter in Pacific Grove.

340 bicycles, 65 feet high.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

A multimedia experience that chronicles the atrocities of racism.

The final resting place of a space program monolith.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

Historic funicular railway, believed to be the shortest railroad in the world.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This one-block alleyway is stuffed with street art that is colorful, cultural, and intensely political.