The LHC Is Coming! The LHC Is Coming!
The medieval cathedrals pushed the limits of available technology, involved the craftsmanship of literally thousands of skilled workers, and took generations (and sometimes centuries) to complete. Modern particle accelerators require decades from conception to completion and involve scientists from about 80 countries, speaking dozens of languages, whose separate handiwork must mesh together perfectly on the scale of thousandths of millimeters.
I am planning to visit CERN in July for the first time in over a decade and I am looking forward to seeing the detectors, CMS and ATLAS, while the are still being assembled. Once they start operating no one will get near them except for periodic maintanence periods.