A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

This brightly made over hotel hides decades of suicide, serial killers, and mysterious deaths.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

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

DIY collection of eclectic holdings.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

An extensive collection of ancient Egyptian artifacts and mummies.

A 19th-century shrine covered with prosthetic body parts as votive offerings.

One man's extraordinary topiary garden in a small South Carolina town.

A living archive of urban activism and space reclaimed.

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Abandoned concert venue legendary for its rock counterculture.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

The most unique castle in all of Southern California, entirely constructed from repurposed materials.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

These aggressively sustainable art homes look like something out of 1970's science fiction.

This failed condo development was reborn as a street art hub.

This collection of Japanese luck idols beckons visitors with over 2,000 waving paws.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.