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

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

An eerie, derelict amusement park in Berlin.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

This sword isn't waiting for a king to pull it out. It was placed there by a saint.

This 16th-century monastery has been turned into a surrealist architecture compound.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Thousands of well-dressed mummies below a monastery.

A submerged archeological park still holds the wonders of a Roman Sodom.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A 16th-century horror show built in a lovely Italian garden.