switzerland: large hadron collider
The Large Hadron Collider is the world's largest and highest energy particle accelerator, a synchrotron intended to collide opposing particle beams of either protons or lead nuclei. It is expected that it will address the most fundamental questions of physics, advancing our understanding of the deepest laws of nature. The LHC lies in a tunnel 27 kilometers in circumference 175 meters (574 ft) beneath the Franco-Swiss border near Geneva, Switzerland. It was funded by and built in collaboration with over 10,000 scientists and engineers from over 100 countries as well as hundreds of universities and laboratories. Scientists may even be able to create tiny black holes with it!