CERN's 'Tier Zero' data centre is located on the same site as the Large Hadron Collider, a high-energy particle accelerator set in a 27km tunnel between Switzerland and France, near Geneva. The €7.5 billion project aims to prove or expand upon several key theories in the field of particle physics.
Six detectors - each operating discrete experiments - are housed within the LHC. Each operates its own server farm on site, for real-time filtering of results from particle beam collisions occurring every 25 nanoseconds. From there, results that appear to be of interest are sent in close to real-time to the CERN data centre.