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.

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

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

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.

A long-vacant Scottish Rite temple in Hollywood has been converted into an art museum filled with Masonic relics.

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.

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.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.

Salt is slowly eating away this abandoned saltworks town in the desert.

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.

A lawless town deep in Death Valley was famous for its riches and death rate.

This stately structure has been abandoned for half a century.

The stone walls of a home built to withstand a California wildfire still stand after more than a century.

This mysterious and creepy location instills a strong sense of foreboding in all visitors.

Abandoned in 2009, this once popular resort destination now stands frozen in time.

Once the central jail for Los Angeles, this building housed inmates like Al Capone, those arrested from the Zoot Suit and Watts Riots, and individuals imprisoned for their sexuality.

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