For Parisians, public transport is part of everyday life. Metro, bus, streetcar: they can be so familiar that you'd almost think you knew them by heart. And yet, RATP still has many secrets to reveal. The company is inviting us to take part in special tours of the different lines in its network on September 20 and 21, 2025, to mark the 42nd Heritage Days.
If you've never taken part in this great cultural and popular celebration, get ready to be seduced. Launched for the first time in France in 1984, the Journées du Patrimoine (Heritage Days) return every September to open the doors of thousands of sites all over France. From the country's most famous monuments to hidden curiosities in the depths of a village, visitors enjoy a weekend of discovery.
If you're in one of theÎle-de-France departments during these Heritage Days, don't miss the RATP tours. Please note that many of these tours are only available with registration.
The program in Paris:
Heritage Days 2025 in Paris: discover RATP's secrets and hidden places
RATP is taking part in the 42nd Journées du Patrimoine (Heritage Days) with a network-wide journey to discover the metro in a fun way. Activities, exclusive experiences, tours... See you all over Paris on September 20 and 21, 2025! [Read more]
Thiais - RATP bus center
Visit to the Thiiais RATP bus rewinding and maintenance center
* Visit to the maintenance workshop
* Visit to the administrative offices (control room, line manager, stock of line plans, bus shelters, bollards, etc.).
Photo exhibition on the lines operated by the Thiais bus center, including the TVM line, line 183 and many others.
Installation at the driver's cab of a machinist and explanation of the job and all the controls at the wheel.
Saint-Ouen-sur-Seine - Rolling stock maintenance site
Behind the scenes of maintenance: between industrial heritage and technical know-how
Come and discover the trades, infrastructures, equipment and history of the Saint-Ouen maintenance site. Visit the heritage maintenance workshop, the electronic equipment maintenance workshop and the Line 4 train maintenance workshop.
Sevran - Sevran Beaudottes station
On Saturday, September 20, 2025, come and take a behind-the-scenes look at the future stations of the Grand Paris Express!
For almost 10 years, construction of the Grand Paris Express has been transforming the landscape of the Paris region. You've probably already wondered what lies behind the palisades of the future metro's construction sites.
As part of the European Heritage Days, the Société des grands projets and the companies in charge of the work are exceptionally opening up 13 construction sites at future Grand Paris Express stations.
It's a unique opportunity to visit these titanic worksites and talk to the men and women who are shaping the metro of tomorrow.
https://www.grandparisexpress.fr/evenements
What's on?
An exceptional one-day opening of 13 construction sites, on 4 lines (15 Sud, 16, 17 and 18) of the Grand Paris Express currently under construction.
Who will be there?
The Société des grands projets, in collaboration with the construction companies.
When?
Saturday, September 20, 2025, from 9:30 a.m. to 5:30 p.m.
Where?
At 13 future Grand Paris Express stations
Where?
Free guided tours, no registration required.
Why visit?
See "behind the palisade" and understand the daily life of construction sites.
Discover the scope of the Grand Paris Express project and its future benefits.
Meet the people who are building it.
Practical information
Visit from 1h to 1h30
Welcome, equipment and safety instructions
Presentation of the Grand Paris Express, the station and construction work.
Safe route and guided tour to the platforms
Malakoff - Future Clamart station
On Saturday, September 20, 2025, come and take a behind-the-scenes look at the future stations of the Grand Paris Express!
For almost 10 years, construction of the Grand Paris Express has been transforming the landscape of the Paris region. You've probably already wondered what lies behind the palisades of the future metro's construction sites.
As part of the European Heritage Days, the Société des grands projets and the companies in charge of the work are exceptionally opening up 13 construction sites at future Grand Paris Express stations.
It's a unique opportunity to visit these titanic worksites and talk to the men and women who are shaping the metro of tomorrow.
https://www.grandparisexpress.fr/evenements
What's on?
An exceptional one-day opening of 13 construction sites, on 4 lines (15 Sud, 16, 17 and 18) of the Grand Paris Express currently under construction.
Who will be there?
The Société des grands projets, in collaboration with the construction companies.
When?
Saturday, September 20, 2025, from 9:30 a.m. to 5:30 p.m.
Where?
At 13 future stations of the Grand Paris Express, full list of stations open to visitors: https://www.grandparisexpress.fr/evenements
How to get there
Free guided tours, no registration required.
Why?
See "behind the palisade" and understand the day-to-day life of construction sites.
Discover the scope of the Grand Paris Express project and its future benefits.
Meet the people who are building it.
Practical information
Visit from 1h to 1h30
Welcome, equipment and safety instructions
Presentation of the Grand Paris Express, the station and construction work.
Safe route and guided tour to the platforms
Maisons-Alfort - Vert de Maisons train station
On Saturday, September 20, 2025, come and take a behind-the-scenes look at the future stations of the Grand Paris Express!
For almost 10 years, construction of the Grand Paris Express has been transforming the landscape of the Paris region. You've probably already wondered what lies behind the palisades of the future metro's construction sites.
As part of the European Heritage Days, the Société des grands projets and the companies in charge of the work are exceptionally opening up 13 construction sites at future Grand Paris Express stations.
It's a unique opportunity to visit these titanic worksites and talk to the men and women who are shaping the metro of tomorrow.
https://www.grandparisexpress.fr/evenements
What's on?
An exceptional one-day opening of 13 construction sites, on 4 lines (15 Sud, 16, 17 and 18) of the Grand Paris Express currently under construction.
Who will be there?
The Société des grands projets, in collaboration with the construction companies.
When?
Saturday, September 20, 2025, from 9:30 a.m. to 5:30 p.m.
Where?
At 13 future Grand Paris Express stations
Where?
Free guided tours, no registration required.
Why visit?
See "behind the palisade" and understand the daily life of construction sites.
Discover the scope of the Grand Paris Express project and its future benefits.
Meet the people who are building it.
Practical information
Visit from 1h to 1h30
Welcome, equipment and safety instructions
Presentation of the Grand Paris Express, the station and construction work.
Safe route and guided tour to the platforms
Saint-Germain-en-Laye - RATP Archives
Visit the RATP archives, home to a wealth of precious documents that bear witness to the history of transport in the Paris region: maps, metro tickets, posters and photographs.
Châtillon - Châtillon-Montrouge station
On Saturday, September 20, 2025, come and take a behind-the-scenes look at the future stations of the Grand Paris Express!
For almost 10 years, construction of the Grand Paris Express has been transforming the landscape of the Paris region. You've probably already wondered what lies behind the palisades of the future metro's construction sites.
As part of the European Heritage Days, the Société des grands projets and the companies in charge of the work are exceptionally opening up 13 construction sites at future Grand Paris Express stations.
It's a unique opportunity to visit these titanic worksites and talk to the men and women who are shaping the metro of tomorrow.
https://www.grandparisexpress.fr/evenements
What's on?
An exceptional one-day opening of 13 construction sites, on 4 lines (15 Sud, 16, 17 and 18) of the Grand Paris Express currently under construction.
Who will be there?
The Société des grands projets, in collaboration with the construction companies.
When?
Saturday, September 20, 2025, from 9:30 a.m. to 5:30 p.m.
Where?
At 13 future Grand Paris Express stations
Where?
Free guided tours, no registration required.
Why visit?
See "behind the palisade" and understand the daily life of construction sites.
Discover the scope of the Grand Paris Express project and its future benefits.
Meet the people who are building it.
Practical information
Visit from 1h to 1h30
Welcome, equipment and safety instructions
Presentation of the Grand Paris Express, the station and construction work.
Safe route and guided tour to the platforms
Villejuif - Villejuif Louis Aragon station
On Saturday, September 20, 2025, come and take a behind-the-scenes look at the future stations of the Grand Paris Express!
For almost 10 years, construction of the Grand Paris Express has been transforming the landscape of the Paris region. You've probably already wondered what lies behind the palisades of the future metro's construction sites.
As part of the European Heritage Days, the Société des grands projets and the companies in charge of the work are exceptionally opening up 13 construction sites at future Grand Paris Express stations.
It's a unique opportunity to visit these titanic worksites and talk with the men and women who are shaping the metro of tomorrow.
https://www.grandparisexpress.fr/evenements
What's on?
An exceptional one-day opening of 13 construction sites, on 4 lines (15 Sud, 16, 17 and 18) of the Grand Paris Express currently under construction.
Who will be there?
The Société des grands projets, in collaboration with the construction companies.
When?
Saturday, September 20, 2025, from 9:30 a.m. to 5:30 p.m.
Where?
At 13 future Grand Paris Express stations
Where?
Free guided tours, no registration required.
Why visit?
See "behind the palisade" and understand the daily life of construction sites.
Discover the scope of the Grand Paris Express project and its future benefits.
Meet the people who are building it.
Practical information
Visit from 1h to 1h30
Welcome, equipment and safety instructions
Presentation of the Grand Paris Express, the station and construction work.
Safe route and guided tour to the platforms
Massy - Massy-Palaiseau station
On Saturday, September 20, 2025, come and take a behind-the-scenes look at the future stations of the Grand Paris Express!
For almost 10 years, construction of the Grand Paris Express has been transforming the landscape of the Paris region. You've probably already wondered what lies behind the palisades of the future metro's construction sites.
As part of the European Heritage Days, the Société des grands projets and the companies in charge of the work are exceptionally opening up 13 construction sites at future Grand Paris Express stations.
It's a unique opportunity to visit these titanic worksites and talk to the men and women who are shaping the metro of tomorrow.
https://www.grandparisexpress.fr/evenements
Are you passionate about the world of rails and trains? Here are a few ideas for outings during this exceptional weekend.
Trains and stations fascinate young and old alike! If you are, you're in for a treat: many railway sites are opening their doors to you on September 20 and 21, 2025, for the Journées du Patrimoine (Heritage Days). [Read more]
Dates and Opening Time
From September 20, 2025 to September 21, 2025
Prices
Free
Heritage Days 2025 in Paris: discover RATP's secrets and hidden places
Journées du Patrimoine 2025: railway stations and trains to see for railway enthusiasts
