 Modane Underground Laboratory

The Modane Underground Laboratory (Laboratoire Souterrain de Modane, LSM) is a physics research facility located in the French Alps, specifically in the Maurienne Valley, near the town of Modane. Situated beneath approximately 1,700 meters of rock, the laboratory is one of the deepest underground laboratories in the world, which helps shield experiments from cosmic radiation and natural background noise, making it suitable for sensitive experiments in particle physics, astrophysics, and related fields.