You will be interested in interactive experiences to listen to cosmic radiation, films on the underground laboratory, its activities and projects, its "fog chamber" to visualize the traces of cosmic rays ...


"The little secrets of the universe", a permanent exhibition in a 120m² fitted out space: the public discovers a sequence of themes ranging from the evolution of physics to that of our universe to current experiments and future projects.
The Modane Underground Laboratory was dug in the early 1980s in the middle of the Fréjus road tunnel. It is the deepest scientific site in Europe and was designed for fundamental research. It takes advantage of the 1700 m of rock that separates it from the summits to shelter it from cosmic rays. Its location makes it possible to measure sharp epiphenomena: (stability of the proton, neutrino, detection of the hidden matter of the universe... and very weak radioactivity.
Led by an international community of 200 scientists, the LSM is able to deal with subjects such as astrophysics, to better understand the origin of the universe, earth sciences, gamma spectrometry and dating techniques, as well as biology.

Period of opening

From 01/01 to 31/12 between 2 pm and 5 pm.
Closed Saturday and Sunday.
In July and August, a guide is present for the visit. The rest of the year on request.

Equipment & services

  • Parking
  • Pets welcome
  • Guided group tours
  • Unguided individual tours


Free of charge.

Languages ​​spoken

  • English English
  • French French




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Practical information

1125 route de Bardonnèche
73500 Modane
Mail Contacter le prestataire