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

The loneliest island in New York.

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

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

The decaying ruins of Wales' first asylum for the mentally ill.

A long abandoned hospital building on the outskirts of NYC.

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

This abandoned asylum was once a state of the art facility before devolving into one of the most deadly mental institutions in American history.

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.

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

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

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

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

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

An abandoned asylum where patients have been forgotten but their possessions remain.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

The mummified heart of Louis XVII, the lost dauphin of the French Revolution.

A floating cat sanctuary on an Amsterdam canal.

The island of Lanai in Hawai'i is a paradise for cats and cat lovers.

A place of great reverence for Trekkies everywhere, a hero's future birthplace.

The Largest Little Museum in the Northwest.

Largest gathering of hobos in the country has been meeting annually since 1900.

A museum within a museum, devoted to history's most questionable medical devices.