Avant garde house of Pierre Cardin on the Cote d’Azur.

One architect's organic, human-centric design has been fully realized in this alien art house.

Since ancient times these picturesque springs have been providing bathers with healing waters.

This French anatomy museum greets guests with a skinless man, mid-shovel.

Now a memorial, this factory was once used as a concentration camp for artists by the Vichy government.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

The prototype for all Nazi concentration camps.

A Nazi concentration camp and Anne Frank's place of death.

A preserved Nazi labor camp now has a Holocaust museum on site and memorials to the thousands that died while imprisoned at the camp.

Scars of this building's past life as a violent prison still cover its walls.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

Former military fort and site of untold horrors during WWII, this island may become the Adriatic's next luxury resort.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

A fortress built to pacify local uprising that had a stint as a Nazi concentration camp before becoming a five-star hotel.

The site where hundreds of Greeks were tortured by the Nazi secret police is now a cosmetics store.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

During World War II, this rice mill became a Nazi concentration camp.

A somber memorial honors the hundreds of thousands of lives lost at this labor and extermination camp.