The longest burning light bulb in the world.

Where decommissioned airplanes and helicopters go to become part of Hollywood.

Abandoned Air Force base that has fallen into disrepair.

Abandoned hotel with adjacent lake and golf course.

The liveliest ghost town in the state.

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

One of the last free public hot springs is decorated with hippie art.

This ramshackle ghost town is comprised of mining-era buildings collected from around the region.

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

The "Kill Bill Church" was transformed into a place of worship after a long Hollywood history.

San Francisco’s century-old Christmas Tree.

A 140-year-old castle with underground caves hidden in San Francisco.

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

Here, visitors can swing with the waves of the Pacific Ocean.

A psychedelic labyrinth on the San Francisco bay.

This abandoned horse racing track was an exercise in hubris from its inception.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

Arizona's first government hub is a rustic cabin now preserved as part of a historical museum.

The Jewish section of the famous Boothill Graveyard was abandoned for nearly 100 years.

The graffiti-covered ruins of an abandoned trading post in the middle of Navajo Nation.

This huge dam across the Colorado River caused an armed standoff between two U.S. states.

One of the largest open-pit copper mining operations in the entire country.

The stone-covered graves lie within the ruins of an Old West ghost town.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.