An inconspicuous suburban street corner is the site of San Diego's worst air disaster.

An ode to the friendship between four Pacific Rim countries.

A magnificent, reportedly haunted mansion built for a composer by Spiritualists.

This ramshackle ghost town is comprised of mining-era buildings collected from around the region.

An antique store houses the last operational diner from the defunct department store chain.

Nationwide network of co-ownership underground catastrophe shelters.

The biggest pinball arcade in the world has over 600 pinball machines, and 300 arcade machines.

Acres of natural wonders left behind by a socialite-turned-gardener.

In the days before HD projectors and IMAX, some of the most powerful projectors belonged to planetariums.

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

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

The "3rd largest" city in California is an empty mirage of suburbia in the middle of nowhere.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

Hundreds of trees made from glass bottles make up this forest on Route 66.

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

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

Where decommissioned airplanes and helicopters go to become part of Hollywood.

Exotic feline breeding compound and conservation center.

This beautiful ridge-top trail is dotted by tiny homes apparently built by a group of itinerant fairies.

An entertaining journey through the odd and strange awaits visitors to this shop.

The remnants of a failed socialist commune can still be found just off a California highway.

A spiritual center in the Santa Monica Mountains founded by Alice Coltrane after the death of her husband and fellow jazz musician John Coltrane.

A living museum dedicated to the legendary woodworker and his soulful furniture.

This park is home to California's first oil boomtown, with structures that have stood for more than a century.