Here it is my insider’s tip number 3: Ammersee!
If you don’t have any plans for a sunny day you can take a train on Hauptbanhof and go to Ammersee lake! It is about 40 minutes from Munich. You have to climb for about one hour to arrive to the lake but it really worth it! The view is wonderful and you will feel closer to nature. You can also take a sun bath, swim and rent a boat to appreciate the view from the inside of the lake.
Hope you enjoy it,
Gabi