To better understand the scale of the detectors, look at this picture of ATLAS: https://www.google.com/maps/views/view/streetview/cern/cern-atlas/kWZ2TA53b9AAAA

To better understand the scale of the detectors, look at this picture of ATLAS: https://www.google.com/maps/views/view/streetview/cern/cern-atlas/kWZ2TA53b9AAAAQJODkDDg?gl=us&heading=170&pitch=105&fovy=75 https://www.google.com/maps/views/view/streetview/cern/cern-... . There's a _crane_ reaching up to the beamline which is ~1/2 of the size of the cavity the detector is in.