I went back to CERN for a weekend for the Third Collisions alumni event, and there was an opportunity to go underground to visit the LHC experiments. I chose to visit ALICE (A Large Ion Collider Experiment), because it was the only one I wasn't 100% sure I'd seen before, though I think I saw it at the open day in 2008. They didn't have the intro video back then, though. It ended up being a very short visit, because there were a lot of people and not a lot of time (they can only take twelve people down at once.) The detector was closed with concrete blocks (you can see better pictures at https://home.cern/resources/image/exp...) and it's pretty noisy down there, so this is not amazing footage, but it's something.

You might be able to go visit it yourself if you want to get better video! Check out https://visit.cern/guided-tours

For more of my videos of CERN, see    • CERN