Complex sentence: Some of these sites are well known such as the Wasen in Stuttgart and Theresienwiese in Munich; however there are some Volksfest which take place partly in the streets of towns.
Split into simpler sentences: Some of these sites are well known, as the Wasen in Stuttgart or Theresienwiese in Munich. However there are some Volksfeste, which take place partly in places and in streets of towns.