The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

Abandoned anti-ballistic missile base.

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

A hospital closed seemingly in the middle of operations, leaving behind fodder for horror films and ghost hunters.

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

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

The rusting remains of the largest assembled WWII fleet on the West Coast.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

An abandoned 1920s-era stretch of cabins now overshadowed by the 66 Motel.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

An abandoned boat that's been stranded mysteriously for decades.

A ghost town originally established and governed solely by Black Americans seeking a place of their own, free from discrimination.

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

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

The overgrown ruins of a once thriving World War I-era copper mine.

An abandoned Cold War missile radar site.

An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

The remains of a deserted steamboat sit rusting beside an old ferry pier and an abandoned train platform.