One hundred metres underground, excavation work is under way for the High-Luminosity Large Hadron Collider project, CERN Bulletin.
High-Luminosity LHC: diggers at work 100 metres underground
High-Luminosity LHC: diggers at work 100 metres underground
High-Luminosity LHC: diggers at work 100 metres underground
Underground works for the HL-LHC project in progress at Point1 - Image: CERN