I will second BackPacker's suggestion of Tempelhof. A wonderful approach to 27R, and enthusiastic ground staff more than happy to talk to you about the airport's history.
This was part of a 5-day VFR trip in July Blackpool - Cologne - Tempelhof - (unexpected, but enjoyable, wx diversion to Rügen) - Malmö - Charleroi - Blackpool with only 120 or so hours to my name and having held my licence for eight months.
It was a wonderful way to familiarise myself with the formalities for international flight, play with the Garmin 430s and autopilot and spend an afternoon in charming cities (Blackpool excepted...).
Researching and planning this trip did take a little time due to inexperience, but there's plenty of help available on here and subsequent jaunts to continental Europe are now planned in a jiffy.
PM if you need any charts or Jeppesen trip kits.