Faceless white figures loom over the city from the rooftop.

This desert oddity hides in plain sight thanks to a cartographic error and a desert explorer with a punny sense of humor.

The longest burning light bulb in the world.

An abandoned Cold War missile radar site.

The only visible piece of San Francisco's most famous shipwreck.

Haunting and beautiful trees, doomed to die.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

Radioactivity still cause for concern at this urban explorer's paradise.

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

Recovered from the brink of extinction, at home in the Financial District.

Graffiti-covered ruins that were once part of a farm owned by a mental hospital.

This abandoned boat was left in place thanks to its rotting beauty.

This museum looks at the history of one of America's most famous prisons and most beloved albums.

The sun acts as a key that only fits this giant keyhole twice a year.

Over 315,000 preserved amphibians and reptiles in jars.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

This Oakland fairytale kingdom, fiercely devoted to childlike whimsy, was an early inspiration for Disneyland.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

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

A deserted hodgepodge of experimental structures designed by nearby university students.

A vast city of the dead, where the deceased outnumber the living by more than a million.

While exploring the desert, you can stop by the home of a fictional heretic from a parallel universe.

An abandoned, unfinished mansion on grounds strewn with lava rocks.