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Visit the EDF sites
- La Rance

EDF, the leading producer and supplier of electricity in France invites you to take a look behind the scenes at its various sites. How do we produce energy? How is it transformed into electricity? 

Come and get the answers directly on site!

Capture the energy of the tides with the La Rance tidal power plant (35)

Go behind the scenes of the La Rance tidal power plant, located between Dinard and Saint-Malo, at the mouth of the Rance estuary. Champion of renewable energies, hydroelectricity produced thanks to the movements of the highest tides in Europe, allows the La Rance tidal power plant to supply the annual electricity consumption of a town of 225,000 inhabitants, i.e. 12% of the electricity produced in Brittany. This exceptional site, measuring nearly 700 m long and with a power of 20 MW, the tidal power plant is labeled “Site d'excellence des savoir-faire”.

From the inauguration by Charles de Gaulle to the 2000s, the hydraulic development of the Rance will be the only site in the world of electricity production on an industrial scale to use the force of the tides. 

Equipped with a bay window on the machine room, you will enjoy a guided tour updated according to the construction sites and will lift the veil on the production trades. Come and discover the human epic of construction, the technological prowess to exploit the force of the tides, discover how the machinery works and understand the challenges of the energy transition. Don't wait any longer to book!

Our guided tours of the EDF tidal power plant in La Rance

  • ​ Operation of the La Rance tidal power plant

​Guided tour of the permanent exhibition at the Espace Odyssélec in La Rance, which allows you to discover tidal energy, its operating principle, its role in the EDF energy mix and the history of the factory building. Panoramic view of the engine room at the end of the visit and full-size model of a turbine on site.

Duration: 1 am / Hourly: 11 a.m., 2:30 p.m. and 4:30 p.m. / Groups: max 30 people /indoors/Without reservation

  • Special visit "High Tides"

​​ It is in the bay of Saint-Malo that the highest tides in Europe occur with a tidal range that can reach up to 13 m. High tides are an opportunity to discover the dam's equipment in a different way and to understand how this site works, which produces renewable electricity thanks to the tides.

Duration: 1 hour /Groups: 8 to 20 people /Outdoors/On reservation


Visitez La Rance



Visits to facilities reserved for groups within a professional, associative or school framework are onreservation.

Price: free.


Reservation required: • request to be made by email at least 48 hours in advance; • reservation option refused; • reservation systematically confirmed by e-mail by the EDF visit service.


Visiting days: consult the opening calendar here or on


Meeting place: reception of the Discovery area. Accessibility: visit accessible to people with reduced mobility.


Safety: bulky bags (backpacks, handbags, etc.) and dangerous objects are prohibited.

See all tours in Bretagne

Individual / Group Rates & Information

For everyone


Pets are prohibited during the tour.


Compulsory presentation of a valid identity document (ID card or Passport).

Minors must be accompanied for the visit.


Participants: the group must be made up of a minimum of 8 people and a maximum of 30 people. Two visits can be organized simultaneously.

For more information on the EDF site in La Rance :


Espace EDF Odyssélec
Usine marémotrice de la Rance
Route du barrage
35 780 La Richardais

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