The largest airport in Germany, Frankfurt can feel like a maze. There are only two terminals, and you can walk between them, but the airport is also connected to the city's public-transit system, scores of shops — including a grocery store — and a hotel.
Once safely in the terminals, thinking you know where you are, you'll need to remember that zones A through C are in Terminal 1, and D and E are in Terminal 2. And then, of course, there are times when you actually have to take a shuttle from your gate to your plane. It's a wild adventure!