When you land at Geneva airport, just before you leave the baggage reclaim area, there is a machine by the door that gives you free travel in Geneva for 90 minutes anywhere in the city.
You have to get it BEFORE you leave baggage reclaim though. Once out the door, turn left in arrivals lounge and go all the way to the end into the Station. Walk in a little way and turn 180 degrees and go up the stairs behind you and come out right at the bus stop and get the number 10 which takes you to Gare Cornavin (the main station in Geneva).
Geneva Airport, in the Baggage Reclaim area just before the doors to leave.
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