This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

A crumbling hospital from the 1850s on Roosevelt Island.

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

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

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

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

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

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

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

An abandoned asylum once on the cutting edge of lobotomies may be reborn as a Christian college.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

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

A beautifully designed asylum was resurrected as a hotel and art center with a ghost story or two.

Underground tunnels remain beneath this abandoned mental asylum.

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

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

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

A formerly abandoned mental institute, now back in business.

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

A remote horde of architectural treasures fit for Indiana Jones.

A hidden alley in urban Baltimore is a haven for graffiti artists.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.