The world's largest cemetery.

Auschwitz-Birkenau the place where 1.6 million people, most of them Jews, were gassed to death. The victims were then burned in ovens and their ashes dumped in nearby ponds and fields. The Auschwitz-Birkenau complex, in occupied southwestern Poland was the biggest death camp in the Nazi system.

As the war ended, the Nazis tried to destroy the gas chambers, and today most of the camp lies in ruins. The derelict state of most of Auschwitz has given rise to a debate; whether the restore the ruins or leave them to fall apart.

Frenchman Jean-Claude Pressac believes Auschwitz should be rebuilt. He says visitors should be able to follow the footsteps of victims into underground cloakrooms where they were ordered to undress. People today should get the "slap in the face" that would come from being in the place where the naked victims were herded into the chamber in which they were gassed. He says this would remind people "that this was insane and criminal. You can't create memory, but you can create an experience that is as powerful as memory."

Others are concerned that reconstructing the camp would turn it into something approaching a theme park; cheapening its meaning. British scholar Jonathan Webber asks: "Can you say Auschwitz lies in its meaning and not its physical site? If you have a brick wall against which people faced the firing squad, is it important to have the wall or to remember they were shot?"