Remembrance Day ( or also known as Armistice Day ) is on November 11th 1918 ( the "eleventh hour of the eleventh day of the eleventh month" of 1918 ) commemorating the cessation of hostilities of World War I.
WWI was branded as the
War to end all Wars.
I stumbled across a website that lists some pictures of landscapes that remain pretty much untouched since WWI.

Shell shock: Lochnagar Crater at the Somme as it is today. The picture is part of a collection of World War One landscapes which still bear the signs of war damage
The big bang: The detonation of buried British mines that formed the Lochnagar crater. The blast was heard 160 miles away in London in 1917
Source and more pics with stories at:
http://www.coolcrack.com/2011/11/ama...ape-still.html