WWI sites, Menin Gate, Belgium

The absolutely huge WW1 cemetary at Tyne Cott near Ypres. Simply; every British person some come and see this, and think.
The Menin Gate, Ypres, Belgium. The huge British Commenwealth War memorial with lists of names of Soldiers lost in battle but have "no known grave" ...
Ypres, Belgium. This building was destroyed in both World Wars and rebuilt both times.