Berlin rings in the anniversary with 200 events in key locations of the city. A new AR app even gives users an interactive experience with the former wall.

The Berlin Wall, approximately 27 miles long, is dismantled by a crane as East Germany begins to dismantle the wall on Feb. 20, 1990, near the Brandenburg Gate in East Berlin, as a crowd watches.

In this Nov. 11, 1989, photo, East German border guards are seen through a gap in the Berlin wall after demonstrators pulled down a segment of it at Brandenburg gate. (LIONEL CIRONNEAU/Associated ...

President Obama will deliver a speech to Berlin at Brandenburg Gate; Ronald Reagan delivered his famous %22tear down this wall%22 speech in 1987 at the gate ...

U.S. President Ronald Reagan, commemorating the 750th anniversary of Berlin, addresses on June 12, 1987, the people of West Berlin at the base of the Brandenburg Gate, near the Berlin Wall.

A woman cycles past a part of the Berlin Wall with the Martin-Gropius-Bau gallery in the background in Berlin on September 24, 2012. AFP PHOTO / DAVID GANNON ...

The men in yellow slickers worked in the autumn rain, climbing on scaffolding, above stonemasons and architects, through the veiled columns and beneath the bronze chariot of this city’s most ...

East Side Gallery 3-kilometer section of the Berlin Wall. Following the Wall's fall in 1989, ... The Brandenburg Gate is an ...

Two scenes from the end of the Cold War: Scene one: On June 12, 1987, President Reagan stood before the Berlin Wall, the Brandenburg Gate rising behind him, to challenge to the leader of the Soviet… ...

East Berliners stand on top of the Berlin Wall near the Brandenburg Gate, Dec. 22, 1989, after two crossings were opened, making the historic site a public place for the first time in 28 years.

Berlin schoolboys proudly show off bricks of the Berlin Wall they found near Brandenburg Gate in Berlin from last night's celebrations at the opening of the East German border to the West, Nov. 10 ...

Like a monstrous guillotine, the wall has slashed the arteries and nerves of Ber lin. It cuts through sewers and subways, severs bridges and thoroughfares. It bisects a cemetery, shears off ...