From Hamburg follow the Autobahn A7 northward to the exit Flensburg/Glücksburg, Then follow the B 200 (Bundesstrasse) in the direction of Flensburg until turn off to Glücksburg. Now follow the B199 until the sign to Glücksburg/Fördeland-Therme. Turn left here and follow the signs for Glücksburg an then Holnis.

Have a safe trip!