The LHC site in Ornex provides underground access to Point 7, located beneath Collex-Bossy. This site is home to one of the LHC's eight cooling plants, which keep the temperature of the accelerator at -271°C. The green tanks on the surface are used for storing helium.
Cryogenics Stage: Cryogenics: the ice genie
More information on http://cern.ch/passeport-big-bang