NH Dave, 'Wo de Nordseewellen trecken an den Strand' is a Low German song and was quite able to bring tears to the eyes of my grandmother, who was born on the North Frisian island of Pellworm. Only much later did I learn that in its first incarnation the song was from Pomerania and had actually referred to the Baltic (Ostsee). I also seem to remember it was not a folk song as such but written by a local poet. I have to admit it's rather sentimental, but I like it (though perhaps not with choral harmonies)!