The Large Hydron Collider (HCL) | biggest machine in the world

The Large Hadron Collider is the world's largest and highest-energy particle collider. It was built by the European Organization for Nuclear Research between 1998 and 2008 in collaboration with over 10,000 scientists and hundreds of universities and laboratories, as well as more than 100 countries. Wikipedia
Opened: 21 October 2008
Location: Near Geneva, Switzerland; across the border of France and Switzerland. Mostly in France
Circumference: 26,659 metres; (16.565 miles)
Coordinates: 46°14′06″N 06°02′42″E / 46.23500°N 6.04500°E
Dates of operation: 2010 – present
Maximum energy: 6.8 TeV per beam (13.6 TeV collision energy)
Maximum luminosity: 1×1034/(cm2⋅s)