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

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.

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.

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

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

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.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

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

This old mining town, deep in the California desert, has a year-round population of one.

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

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