This ghostly Alaska village still clings to a steep cliffside despite having been abandoned for over 50 years.

This dilapidated castle-like structure overlooks the Hudson River at one of its widest points and was once home to nuns.

An abandoned concrete jungle surrounded by a lush park.

This mining town boomed in the Atomic Age when uranium was gold, only to be abandoned when the industry collapsed.

The deserted railroad town had a last gasp as a ghost town attraction before being abandoned for good.

This Queens hospital has stood abandoned for almost 20 years after its patients were secretly relocated in the dead of night.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

The awe-inspiring ship from the golden era of cruising has an incomparable history and a reputation as one of the world’s most haunted places.

The ruins of this Alaska gold mine form a gorgeous ghost town.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

An ever-evolving wall of graffiti art off East Liberty Street.

The final resting place and once home of the Bandit Queen of the West.

Machinery left over from California's once thriving mercury industry now attracts artists and explorers.

This off-the-beaten-path abandoned town is a relic of Montana's silver mining boom.

The abandoned grounds and derelict greenhouses of this once-magnificent Edwardian estate are now a nature preserve open for exploration.

The crumbling ruins of this southern American fort have survived storms, war, and cults.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

Paths are maintained, but trees have taken over plots.

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

An abandoned Depression-era zoo hidden just off the highway.

A few dilapidated structures are all that remain of this deserted former silver mining town.

Ghost stories surrounded this “castle,” the only structure from a huge mansion that was never built.

This railroad tunnel was once the longest in Massachusetts.