The strip of land between between east and west sections of the Berlin Wall was effectively no-man's land but was known colloquially as the Todesstreifen (the death strip).
it was dividing east berlin and west berlin
Berlin, a city of 3.5 million with a very large land area, has a lot of postal codes. Try: http://en.wikipedia.org/wiki/List_of_postal_codes_in_Germany#10115_-_14199
Most of Berlin Wall has been dismantled with many sections being gifted by the German government to local and foreign museums. However, there are still bits of it standing where they were in the center of Berlin, especially in the area close to the Checkpoint Charlie Museum.
The area of Zehlendorf - Berlin - is 18.8 square kilometers.
The area of Wartenberg - Berlin - is 6,920,000.0 square meters.
The area of Karow - Berlin - is 6,650,000.0 square meters.
The area of Johannisthal - Berlin - is 6,540,000.0 square meters.
The area of Blankenburg - Berlin - is 6,030,000.0 square meters.
The area of Buch - Berlin - is 18.2 square kilometers.
The area of Berlin Zoological Garden is 340,000.0 square meters.
We do not have East Berlin anymore. You are 20 years to late. The total area of Berlin is 892 km² (344 sq mi).
The area of Roman Catholic Archdiocese of Berlin is 31,200 square kilometers.