- Large Hadron Collider
- 26.6 kilometre(s)
- Switzerland (Berne,,Located on the Franco-Swiss border near Geneva, Switzerland)
The Large Hadron Collider (LHC) is the largest and most complex machine ever built. Located on the Franco-Swiss border near Geneva, Switzerland, it consists of a 27-km-long (16.7-mile) circular tunnel under the ground. It was built by the European Organization for Nuclear Research (CERN) between 1998 and 2008 at an approximated cost of 4.6 billion Swiss francs (£2.9 billion; $4.4 billion).