Wikipedia:

The E6 European long distance path or E6 path is one of the European long-distance paths from the northwest tip of Finland through Sweden, Denmark, Germany and Austria to the Adriatic coast in Slovenia. A second section starts again in Greece to finish in Turkey.

schabudabu:

This year i will walk a part of the E6 European long distance path. My part  is between Flensburg and Büchen in northern germany.