Berlin's major New Year's Eve celebration is held at the Brandenburg Gate, a landmark often illuminated for the event.
The gate stands at the western end of Unter den Linden and has become a powerful symbol of Berlin and German history. The public celebration around it typically includes a large stage program, food stalls, light effects, and midnight fireworks.
The Brandenburg Gate was completed in 1791 as a neoclassical city gate. Its location later placed it beside the Berlin Wall, and the gate became an important symbol of German division and reunification. Since German reunification, large public events there have carried particular symbolic weight.
Berlin Cathedral and the Fernsehturm are also recognizable Berlin landmarks, but neither is the standard answer to the question about the city's central New Year's Eve celebration. The event is commonly described as taking place at or near the Brandenburg Gate.