Munich is a place to visit year round: warm summers in lovely garden restaurants and open-air stages and snowy winters with romantic Christmas markets and outdoor winter fun.
Sightseeing in Munich: the town hall square, Nymphenburg castle, Residenz, Opera house, Olympia Park, lots of galleries & museums and the beer festival end Sept./begin. Oct. Munich is a very safe city and very green.
Close to Salzburg, Austria(city of Mozart) is 130 kms (1h-1h30) and to King Louis's (of Bavaria) castles is about 100 kms (62 miles). It is less than 2 hrs drive to the Austrian, Swiss, Italian and Czech republic borders. The region of Bavaria has a lot of lakes, forests, mountains and castles. It is very good for hiking and cycling. Nearest ski resorts are 45 minutes away.