The Journées du Patrimoine are inviting you to meet up this weekend of September 19-20, 2026 in Paris and Île-de-France. This cultural event is a must-see for lovers of good deals: every year it invites us to discover our heritage in a new light through a stellar program of guided tours and activities in the finest museums, monuments, castles, and even in places usually closed to the public, opening their doors. Des activities generally free qu'il ne faudra pas manquer donc !
Heritage Days 2026: the top picks to discover in Seine-Saint-Denis (93)
Heritage Days unveil a rich program in Seine-Saint-Denis on September 19 and 20, 2026. The 93 department opens the doors of its century‑old factories and buildings. Here are the can't-miss highlights for this edition. [Read more]
Think you know Paris inside out? Well, you’re in for a surprise. On Saturday, September 19 and Sunday, September 20, 2026, you’ll be blown away by the Heritage Days. We’re sharing our quirky must-sees to discover during these 43rd Heritage Days, in Paris and the Île-de-France region. [Read more]
If you’re passionate about the aviation sector or eager to discover the heritage of Seine-Saint-Denis, then head to the first airport in France: the Roissy-Charles de Gaulle Airport. Built to relieve the congestion at the Orly Airport, it was inaugurated in 1974 and named in honor of the President of the Republic then in office : Charles de Gaulle.
And to say the least, this Parisian airport has more surprises in store than you’d expect. By the way, did you know it’s also the second-largest hub in the world? Yes, really. Come uncover all the secrets of the airport on Saturday, September 19, 2026.
The Maison de l'Environnement de Paris Charles-de-Gaulle in Tremblay-en-France
Behind the scenes tour of Terminal 1 at Paris-Charles de Gaulle Airport
Pedestrian tour of Terminal 1's restricted area
Discover the story of the legendary Terminal 1 and the major renovation of its boarding satellite concourses.
In this remarkable space, Groupe ADP launched in 2023 its new airport retail and hospitality brand: Extime.
Join this unique behind-the-scenes tour of the airport!
Meet at the Maison de l'Environnement for a briefing, then we’ll take the CDG VAL to Terminal 1.
The tour is conducted on foot in the restricted area, a valid ID or passport is mandatory. Send a front‑and‑back copy of your ID one month in advance to: visitecdg@adp.fr
Participation conditions: Limited to 20 people. The tour takes place on foot in a restricted area, and a valid ID or passport is mandatory. Send a front-and-back copy of your ID one month in advance to: visitecdg@adp.fr - Free | Reservations required - https://my.weezevent.com/visite-pieton-en-zone-reservee-du-terminal-1
Schedule: Friday, September 18, 2026 — 2:00 PM to 4:00 PM
Visit Terminal 1 at Paris-Charles de Gaulle Airport
Public Walking Tour of Terminal 1 in the Public Zone
Open to children aged 8 and up
Meet at the Maison de l'Environnement et des Territoires, and enjoy the incredible view of Paris-Charles de Gaulle Airport from the terrace!
We will then take the CDG VAL to Terminal 1. Learn the history of this iconic terminal with an architect from the ADP group, and discover how it has evolved through the renovation of its satellite piers, the Departures level, and the Arrivals level.
– Group of 40 registered - The tour is on foot
Participation conditions: Limited to 40 participants — Free | Reservations mandatory — https://my.weezevent.com/visitez-le-terminal-1-de-laeroport-paris-charles-de-gaulle
Hours: Saturday, September 19, 2026 — 09:30 to 11:30
Family workshop on photography and aviation
On the terrace of the Environment and Territorial Affairs House at Paris-Charles de Gaulle Airport, alongside photographers from the Luzarches Photo Club, you’ll learn:
Aircraft in motion photography: Employ slow shutter techniques to capture the movement of planes in flight or during takeoff and landing. This can create striking visual effects, such as light trails.
Aircraft in their environment photography: Capture planes within the airport context, with terminal buildings, runways, and other elements of the airport infrastructure. This can include shots of aircraft set against scenes of life at the airport.
Participation conditions: Free of charge
Schedule: Saturday, September 19, 2026 — 11:30 AM to 12:30 PM, 3:30 PM to 4:30 PM
Explore the Paris-Charles de Gaulle airport area and the Fabrique du musée in Gonesse
Bus tour of Paris Charles de Gaulle Airport and the Museum Factory
The tour is open to children aged 8 and up.
Meet at the Environment and Territories House of Groupe ADP, after which we’ll board a bus for a guided tour of Paris–Charles de Gaulle Airport, observing the northern runway complex, Terminal 1, and the technical area.
Next, participants will travel by bus to the Museum Factory in Gonesse, where they will explore this prefiguration space for Gonesse’s future Museum of History and Society, focused on education and health. Located in the Coulanges Cultural Hub, it traces the history of schooling in Île-de-France. The official museum will open in 2029 in the 1841 hospital-hospice building; this visit will offer a preview of the museum’s exhibitions, with a theatrical performance.
Return is scheduled to the Environment House, where a snack will be provided.
Group size: 20 people.
Participation conditions: Limited to 20 people - Free | Booking required - https://my.weezevent.com/decouvrez-le-territoire-de-leroport-paris-charles-de-gaulle-et-la-fabrique-du
Schedule: Saturday, September 19, 2026 — 1:30 PM to 5:00 PM
An exciting program!
Dates and Opening Time
On September 19, 2026
Location
House of the environment and sustainable development
2 Route du Noyer au Chat
93290 Tremblay en France
Route planner
Prices
Free
More information
visit at 10 a.m.
Heritage Days 2026: the top picks to discover in Seine-Saint-Denis (93)
Heritage Days 2026: Offbeat & original outings to explore in Paris and Île-de-France
