highway-prescription:

Munich -> take the freeway approach at Salisburgh (A10) -> at Villach take the A2 for SLO (Slowenia) -> take the exit at St. Niklas/Faaker See.

Online map: map24

detailled prescription:

leave the freeway at St. Niklas/Faaker See -> drive across "Egg" and after the OMV-filling station turn left (now you drive on the "Egger Straße") -> after about 2 km turn left at Ledenitzen (now you drive on the "St.-Martiner-Straße") After some meters you can see the "Forellenhof" on your right hand side -> in about 150 meter you can see the "Römerweg" on the left hand side -> Landhaus Schreier