An abandoned network of military bunkers and tunnels open for anyone willing to descend into the darkness.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.

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

Hidden beneath a lake for decades, this brutalist mine has now emerged from beneath the receding waters.

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

This stately structure has been abandoned for half a century.

This once sprawling resort now sits abandoned, filled with graffiti and vibrant colors from an era long passed.

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

This semi-spooky remnant of an abandoned hotel provides fantastic views.

This abandoned mine offers a glimpse at what life was like for those who came to Alaska seeking Gold Rush riches.

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.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

The only thing still moving in this town is the eponymous hot spring.

The Grand Canyon’s original airport, which once welcomed pilots like Amelia Earhart and Charles Lindbergh, lies abandoned.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

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