Berlin
Berlin is the capital of Germany. The city has three airports "in a row" which you will be visiting all. Start at Shonefeld (EDDB) and fly north-west to Tempelhof (EDDI). The ground and the old terminal buildings from 1927 of Tempelhof are somewhat characteristic. Fly north from EDDI to the city centre where you will see a lot of famous buildings, e.g. the Reichstag and Brandenburg Gate. Continue to north-west and land at Tegel (EDDT).