A red booth at Potsdamer Platz highlights Berlin's transformation since 1989. The landmark square was once a waste land, but is now one of Berlin's most contemporary and liveliest areas.

The fall of the Berlin Wall paved the way for the unification of Germany on Oct. 3, 1990, less than a year after the border reopened. The demolition of the Wall ended in 1994.

The Berlin Wall was built in 1961 during the Cold War to separate the Soviet-controlled East and the Democratic West. The wall, made of concrete and barbed wire, stood for 28 years.

The Berlin Wall was built in 1961 during the Cold War to separate the Soviet-controlled East and the Democratic West. The wall, made of concrete and barbed wire, stood for 28 years.

The Berlin Wall was built in 1961 during the Cold War to separate the Soviet-controlled East and the Democratic West. The wall, made of concrete and barbed wire, stood for 28 years.