Last night GLH asked me if the flight to our Secret Destination was more than 2 hours. I said it was. Then he asked if it was more than 4 hours. I said it was not. Then I refused to answer any more questions.
Here is the map he put together...
The first circle represents what would be approximately a 2-hour flight from Zürich. The second represents a 4-hour flight.
He is also putting together a spreadsheet to include additional criteria based upon previous clues.
Oh My God! I married a Geek!