I still haven't been to Berlin :( And I really regret it, because it's closer than Warsaw. I already have 3 cards from Berlin, they all show different places that are definitely worth visiting.
Here's some information about the Charlottenburg Palace:
Charlottenburg Palace (German: Schloss Charlottenburg) is the largest palace in Berlin and the only building in the city dating back to the time of the Hohenzollern family.It is located in the Charlottenburg district of the Charlottenburg-Wilmersdorf area.
The palace was built at the end of the 17th century and was greatly expanded during the 18th century. It includes much exotic internal decoration in baroque and rococo styles. A large formal garden surrounded by woodland was constructed behind the palace. In the grounds of the palace various buildings were erected, including a belvedere, a mausoleum, a theatre and a pavilion. During the Second World War the palace was badly damaged but has since been reconstructed. The palace, its gardens and the buildings in the grounds are major visitor attractions.
I'm sorry for the poor quality of scan. Sometimes there are vertical stripes on the picture and even though I scan again in such cases - there are stripes again. Maybe someone could explain it to me or give some advices?