Berlin is the capital city of Germany located in the northeast of the country. It has a population of around 3.4 million people. The document outlines Berlin's history including World War 2, the building of the Berlin Wall in 1961 by East Germany to separate East and West Berlin, and its destruction in 1989 which marked the reunification of Germany and a new period for Berlin. It describes several important landmarks in Berlin including the Brandenburg Gate, the German parliament building, and monuments commemorating those who died in World War 2.