This exercise is like the one you did in episode Start/Imagination. But it's longer. So make sure that you aren't disturbed during the exercise (16 mins). Then start the audio file, close your eyes and follow the voice. Enjoy it!
For a good result you should try to imagine as lively and intensely as possible. If you can't concentrate: don't worry! Follow your imagination. That's okay. If you like to repeat: do it whenever you want! It helps you to immerse in the German language.