One man's swirling six-acre monument of stone.

St. Mary's Asylum was isolated and abandoned before being converted into a Bed and Breakfast.

An abandoned asylum incorporated into a college campus.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

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

Now abandoned, this East Austin school for the disabled began as the "State Colony for the Feeble-minded."

A haunted hot springs hotel that went from healing retreat to asylum before it was restored.

Once known as the Illinois Asylum for the Incurable Insane.

The deserted remains of a luxury hotel turned hospital ward.

Haunted tuberculosis hospital built by the patients.

Underground tunnels remain beneath this abandoned mental asylum.

Dilapidated ruins that once treated a notorious young serial killer, currently hosting vandals, squatters, and ghost hunters.

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

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

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

The abandoned hospital whose elaborate ghost stories cover up the dirty truth - an uneventful sanitation issue and other mundane reasons for its demise.

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

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

This abandoned asylum in Wales might look haunted, but it's still beautiful.

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

Once a place of peaceful repose, this sanitarium now faces an uncertain future.

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