An eclectic trailer park retreat in the middle of the California desert.

These lush groves of fan palms rise up like oases out of southern California's Colorado Desert.

An off-grid art installation that encourages its visitors to imagine a world without waste.

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

The creator of the carousel's bingo-pinball hybrid survives in California's oldest gaming establishment.

One doctor's retirement plan included opening this award-winning Mexican-Indian eatery on the ground floor of a hospital.

This temple, built by an eccentric religious leader before his death, sits guarded and in ruins.

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

Fans of the spicy bright-red sauce can tour where it's made.

A strange house built only at night, with rumored mystic inspiration.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Abandoned anti-ballistic missile base.

Surreal riveted sea forts once protected the Kent shores from German attack.

Odd outsider art installations surround a Gold Rush-era ghost town.

This foolish Victorian sea fort was converted to a deluxe hotel.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Secret US military film studio in the Hollywood Hills.

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

Subterranean house made out of a grain silo, located in the Santa Cruz Mountains.

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

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

A house built from trash known as the poor man's Hearst Castle.

A hand-built folk art installation covered with messages of God's love.

An eccentric folk art landmark made out of discarded bottles by an inspired "grandma."