This Victorian graveyard in Leeds is a macabre collection of beautiful tombs and memorials.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

This Gothic castle-like portal is a testament to the amazing craftsmanship of the navvies who built the railway tunnel.

Once a farm where patients tilled the soil, this asylum lost its workforce when overmedicating became common practice.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

A recently abandoned psych ward at the end of Sanatorium Road.

This abandoned artificial island off the coast of New York City is now home to dozens of harbor seals.

Underground tunnels remain beneath this abandoned mental asylum.

Portland had a unique approach to Cold War-era protections.

Abandoned village in Sicily built during the agricultural reforms of Mussolini.

One of the most poignant ruins of the Chernobyl nuclear disaster, the local football team's stadium has been quickly reclaimed by nature.

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

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

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

Venice's "Island of the Mad."

The remains of diamond fever taken over by the desert.

Historic psychiatric asylum and most-filmed location in the Great White North.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

A crumbling hospital from the 1850s on Roosevelt Island.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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