The Berlin wall was a physical barrier completely encircling West Berlin, separating it from the (East Germany), including East Berlin.
The wall separated East Germany from West Germany for more than a quarter-century, from the day construction began on 13 August 1961 until the Wall was knocked down on 9 November 1989 and Germany was united again.
During this period, at least 98 people were confirmed killed trying to cross the Wall into West Berlin, according to official figures.
The wall is a must see in Berlin and there are many museums and tours to help you understand how many people suffered due to the wall such as the excellent Checkpoint Charlie museum.
The Berlin Radio Tower, Standing at 138-meters high, is a fantastic viewing point with panoramic birdís-eye views of the city which was once divided.