The Large Hadron Collider (LHC) is the world's largest and most powerful particle collider, the largest, most complex experiment ever built, and the largest single machine in the world. It was built by the European Organisation for nuclear research (CERN) between 1998 and 2008 in collaboration with over 10,000 scientists and engineers from over 100 countries, as well as hundreds of universities and laboratories. It lies in a tunnel 27 kilometers (17 mi) in circumference, as deep as 175 meters (574 ft) beneath the France-Switzerland border near Geneva, Switzerland. Its first research run took place from 30 March 2010 to 13 February 2013.
They are trying to replicate the big bang by spinning particles around the tube at around 299.8 million meters per second completing 11,245 laps of this ring every second. This is equivalent to travelling around the circumference of the Earth seven and a half times in one second. Wow!