The remains of a massive blast furnace in what was once one of the country's largest iron-producing regions.

A nearly century-old amusement park is quietly decaying in a riverside forest in South Carolina.

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

A remarkable cabinet of curiosities in an art space in the center of Berlin.

The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

The Ranger’s House exhibits fine mementos collected by Sir Julius Werner during the course of his life, including this infamous pendant.

This small museum displays a collection of outsider art and scale models of past "treatments" for mental illness.

A museum dedicated to the history of psychiatric treatment featuring a gallery of art made by patients.

A subterranean world of tunnels links several buildings of this rare 19th-century asylum.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

A historic chapel filled with colorful murals and a colorful past.

This decrepit abandoned building is made all the more eerie by its dark history.

Run by a eugenics advocate, this aging institution conducted secret radiation experiments sponsored by Quaker Oats.

This former asylum for Black Americans is haunted by its history of violence and racism.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

Paranormal investigators claim this abandoned asylum is the most haunted spot in the eastern U.S.

This mouldering abandoned mental hospital was once a center for progressive healing.

This abandoned orphanage-turned-asylum witnessed a terrible chapter in Québec's history.

An abandoned Jewish sanatorium is tucked within the woods of Poland.

Clusters of abandoned buildings hint at the facility's 144-year history with psychiatric health.

Government testing at the asylum briefly explored using marijuana as a "truth serum" on Nazi prisoners of war.

One of the largest-ever mental hospitals now sits abandoned, surrounded by 25,000 unmarked graves.

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.