Why is it so difficult to get a guided tour?

CERN is open to all but receives about two times more requests for places on guided tours than it can accommodate.
Places for the Guided Tours for Individuals are gone in seconds every morning and Guided Tours for groups should be booked as early as possible (i.e. 9 months in advance).

Even though CERN considers outreach, and therefore guided tours, as part of its key missions, its main mission is fundamental research.

Therefore, budgetary, technical and safety constraints limit CERN visits service's capacity (even though CERN welcomes more than 150,000 visitors each year on guided tours, in addition to the visitors visiting freely our exhibitions). Visits Service makes sure to give a fair distribution of the tours between nationalities, languages, age groups etc.

If you cannot get your guided tour here are some alternative solutions:

  • Try another date
  • Our exhibitions offer a very good alternative to get an idea on what CERN looks like from the inside. They are accessible freely, no reservation is needed.
  • Check our online resources as well

We thank you for your understanding !