This Boy Scout retreat acted as "Friday the 13th"'s original Camp Crystal Lake.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

An art deco ice cream shop covered in vintage train station tiles.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

The hidden lair of an alchemist rediscovered in a 2002 flood.

One man's personal collection of KGB memorabilia is presented along with his strange viewpoint.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

A Cold War atomic camp buried under the ice is now emerging because of global warming.

This cemetery features modernist statues as strange as its name.

Once thought to be the mysterious work of a witchy prophetess, a well with unusual properties turns objects into "stone".

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A crumbling hospital from the 1850s on Roosevelt Island.

From scholastic to sepulchral - now under reconstruction.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Red frames showcase remnants of one of New York's original subway stations.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."