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

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

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

The Citrus Variety Collection at UC Riverside contains two trees of each of the 1,000+ varieties of citrus.

Mexican food and folk art.

A small medical museum with a recreated doctor's office.

This California tree is the single source of the state's entire orange industry.

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

This traditional garden in the San Fernando Valley doubled for Star Fleet Academy, and is irrigated entirely by wastewater.

One of the largest helium balloons in the U.S. is a 112-foot ginormous orange.

Room 32 of the Alta Cienega Motel has grown into a shrine to the Lizard King.

This Pringle-shaped ledge makes for the perfect photo op.

Hidden above a drug store on a nondescript corner of Lincoln Heights is a private clubhouse for intrepid explorers.

The show's fictional Korean medical camp was created in the Santa Monica hills.

The Hopi-style structure was built by the man who discovered Desert Hot Springs' famous mineral water.

The cluster of boulders near Fort Irwin is covered in military insignia.

The dramatic upward-curving roof is one of the most iconic examples of Googie architecture that still stands today.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

This enormous World War II relic is one of the largest wooden structures in the world.

A psychedelic labyrinth on the San Francisco bay.

What began with a single, 357-pound chunk of the Canyon Diablo meteorite grew to be an impressive collection. 

Her final resting place was intended to be modest and private, but the power of her popularity continues to draw visitors.

A multimedia experience that chronicles the atrocities of racism.