The train is the best way to travel to the German capital: several times a day, the ICE high speed trains will take you from Brussels or Liège straight to the heart of Berlin (with an easy change in Cologne). You can also take a direct night train to Berlin every night (except on Sunday night), either with Nightjet or with European Sleeper.
Experience world history in Berlin! Walk under the Brandenburg Gate and along the remains of the Berlin Wall. Visit the Bundestag, Museum Island and the lively districts of Kreuzberg or Prenzlauer Berg.