This impressive tunnel was dug entirely by hand over the course of 36 years.

Abandoned hotel with adjacent lake and golf course.

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

The San Andreas Fault spectacularly offsets this creek.

Colorful Native American paintings are hidden within this small cavern.

The ruins of the castle that chemicals built.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

A popular winter vacation destination for migrating monarch butterflies.

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

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

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

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

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

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

Though tiki culture has gone in and out of fashion, the Tonga Hut has always been flying the flag in Los Angeles.

Space program, pneumatics and more, bits and pieces, for movie sets or the common man.

Every weekend, the parking lot of this Buddhist temple turns into a Thai street-food paradise.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

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

Medical and zoological curiosities for sale.

World-famous, Pink's still manages to keep its prized cult fetish status.

A cake-themed art installation tucked away in historic Chinatown.