The Olympic Stadium in Berlin is definitely worth a visit. On non-working days you can explore this historical place either alone or on a guided tour.
The Pfaueninsel is located in the Havel in the south-west of Berlin. Since 1990, it has been listed on the list of UNESCO as World Cultural Heritage and is managed by the Stiftung Preußischer Schlösser und Gärten Berlin-Brandenburg – a foundation for cultural property and parks in Berlin and Brandenburg.
Not so long ago in the year 1969, a wondrous amusement park opened in East Berlin. It was called Spreepark Berlin and it remained open until 2002.