Been to CERN underground during one of their open days (every 5 years IIRC). How wires and everything was organized, you could literally eat from the ground of

Been to CERN underground during one of their open days (every 5 years IIRC). How wires and everything was organized, you could literally eat from the ground of any big underground area. Seeing detector opened had similar vibes to that photo but stretched into 3D and it was few tens of meter long and at least 10m wide.