Large Hadron Collider at CERN

This diagram shows the LHC and the SPS pre-accelerator (in blue) and the transfer lines that will connect them (in red). Spanning the France-Swiss border (shown by green crosses), the 27-km LHC tunnel will receive a beam that has been pre-accelerated to 450 GeV in the smaller SPS storage ring. The transfer lines will remove each beam from the SPS and inject them into the LHC where they will be accelerated to the full energy of 7 TeV.
Here's a really interesting article explaining how the Large Hadron Collider at CERN actually works. It's really impressive how it all works considering it will apparently generate 2GB of data every 10 seconds.

This is a breakdown of the computer model, a bit more detailed:

Here is a whole multimedia gallery of images from CERN: