Need 3days in advance notice for a guided tour, an...

Need 3days in advance notice for a guided tour, and it's booked solid for months so register way in advance.

They have a small exhibit for anyone who shows up without a reservation. It is very informative but less than an hour long. there's also a small gift shop.

Cern is always advancing in the technology, so any article you read about it will already be outdated by the time you read it. If you are in the area and like science, DO NOT MISS THIS. Free parking I think.