Note for air passengers:

The Circle is located directly behind the bus station at Zurich Airport and is part of the entire airport. Travellers who are in the airside area can only enter the Circle if they go to the airport exit and then to the Circle. The walk is about 5 minutes. After a visit to cermony, you will have to go through security again if you have a flight to catch. Please ensure that you allow sufficient time to pass through the security check in the airside area.