I heard about the CERN Open Days on the eevblog forum. I managed to get some tickets for an underground tour to the ATLAS experiment so I decided that I just had to go and see CERN for myself.
Me and my girlfriend combined a Paris trip with the CERN part so we took a TGV train to Geneva on Sunday 29th after spending some time in Paris. Under one day was certainly not enough of time to see everything so I tried to cherry pick all the interesting displays. Here is about a hundred pictures from the trip. Enjoy!