“A vast physics experiment built in a tunnel below the French-Swiss border is fast becoming one of the coolest places in the Universe.” [BBC]

Check out more on LHC at CERN or Wikipedia. All the pictures seem to me really impressive. Bad news is 2008 Open day at CERN has been in April :( Hope they will have it next year again, but at that time LHC should be already in operation. So hope nothing will go terribly wrong either this or this way.