Highway A4 till Bautzen (Ost), then on the road B96 till Zittau. Behind Mittelherwigsdorf follow the signs.
from Berlin:
Highway A13/A15 till Roggosen, then on the road B115 till Görlitz and on B99 till Zittau. Then on B96 till Mittelherwigsdorf. Follow the signs.
from Prague:
toll road E65 till Turnov und E442 till Liberec continuing cource Decin, after the main through-road Chrastava consider the signage "Zittau".
Further on B96 course Mittelherwigsdorf and follow the singage.