Here, thanks to the keen eye of Agent 1, is a 16+ minute video of "Flughafen Knuffingen", a tiny perfect airport. It's fully functioning -- an amazing demonstration of what can be done when time and money are no object.
Watch at least long enough to see a take-off and landing. The best ones are towards the end, from about 12:30.
Perhaps Agent 17 can enlighten us as to the aircraft type -- prop job -- which takes off around 14:20?
Thought for the day: This shows what German engineers can do when they are motivated. Didn't the Luftwaffe start with the Hitler youth playing with gliders?!