Cern is a great place to visit. I did not do the t...

Cern is a great place to visit. I did not do the tour as you have to book well in advance. Tickets for the tour are free but they are released on certain days before the tours. There are usually two tours everyday. If you are not able to get a ticket for the tour you can always visit the two permanent exhibits. I spent about 3 hours in these exhibits. Cern is easily accessible via public transportation from Geneva.