Founded in 1954, the European Organisation for Nuclear Research, 8km west of Geneva, is a laboratory for research into particle physics. It accelerates protons down a 27km circular tube (the Large Hadron Collider, the world's biggest machine) and the resulting collisions create new matter. Two exhibitions shed light on its work and two-hour guided tours in English delve deeper; reserve online 15 days ahead and bring your ID or passport. From the train station take tram 18 to CERN (Sfr3, 40 minutes).
