If you think it is a “StarGate” on the above image you are almost right. To be precise, it is a part of the Compact Muon Solenoid (CMS) detector at Point 5 on 27km ring of the Large Hadron Collider (LHC) at CERN (European Nuclear Research Center) near Geneva (Switzerland). The CMS detector is 12 500 tones superconductor solenoid capable of generating 4 Teslas magnetic field. It is located in Cessy (France) almost 100m underground. Hopefully this monster will detect Higgs boson when later this year LHC starts its operation.
On the above photo you may see a part of the tube consisting of superconducting electromagnets just before it enters the CMS detector where two beams of particles traveling at close to the speed of light with very high energies will collide.
Both photos were taken on Sunday the 13th of April 2008 during the visit of Point 5 in Cessy with Nokia N95 and posted with Wavelog.