The best known is Frankfurt am Main. There's also Frankfurt an der Oder. Smaller towns include Freudenstadt (in the Black Forest). If you want a complete list consult the Buch der Postleitzahlen.
How about Frankfurt.
Falkenberg
fresno california
No capital city in Europe starts with the letter F.
Frankfurt
Fairbanks
London is a city, there are no other cities in London.
Faenza, Foggia
· Fresia is a city in Chile
The Main is the longest river lying entirely in Germany. Frankfurt, Germany is a city along the Main.
· Fayetteville is a city in North Carolina
· Forest Park is a city in Georgia
· Fifth Avenue in New York City