Haunting monument to the German Jewish philosopher who died while fleeing fascism.

The world's largest solar furnace uses 10,000 mirrors to concentrate the sun's rays to generate power.

"Drunken ship" sculpture memorializing the French poet in the city where he died.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

This modern French ossuary contains the jumbled bones of 130,000 WWI soldiers.