As a consequence, whilst the Allied forces have many CWGC cemeteries in the area of the Ypres Salient, the Germans have only been allowed the one, established at Langemark. There were more at the end of the Great War, but after the Germans were uninvited guests a second time, the Belgians dug up the other cemetaries as an insult and put the bones in a mass grave at langemark. The Belgians were a bit too enthusiastic and also interred at least one British soldier in the mass grave.
If you are in the area, it's worth a visit. The feeling of the place is very different (much more sombre) than any of the Allied cemeteries.
Langemark has a special place in the German view of the Great War because thats the place where under trained German students led by 1870 vintage officers marched in 1870 formations towards the BEF's 20 aimed rounds a minute per man. There is a memorial chapel to the 3000+ dead students. Hitler visited Langemark in his battlefield tour in 1940.
More information is available on this website