Named after the French minister of war from the time, the Maginot Line went down in history as the symbol of the French defeat of 1940. This long succession of underground fortresses, from Alsace to the Ardennes, was said to be "impassable" but did not keep the German troops at bay for long. Today, enthusiasts are making sure the Maginot Line is not forgotten, by taking care of what remains of the fortifications.