It's time for another edition of the European Heritage Days. This cultural event takes place every year, usually on the third weekend of September, and offers a rich program of visits and discoveries in museums, monuments, fine institutions and even places closed to the public, including ministries and embassies. On the menu are exceptional visits, often accompanied byevents, concerts and workshops to delight young and old alike.
Paris and the whole of the Île-de-France region are obviously part of the program, and it's even an opportunity to discover the treasures of the region's heritage. In fact, in the Yvelines region, the town of Carrières-sous-Poissy is preparing to host the 42nd edition of the event on the weekend of September 20 and 21, 2025. Located on the banks of the Seine, the town invites us to discover its historic monuments through a program specially designed for the occasion. Here's a sneak peek at what's in store for you this year, so you can take advantage of the tours and events specially designed for the Journées du Patrimoine 2025!
At Château Vanderbilt
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
At Saint-Joseph church
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
At City Hall
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
At the insect house
Open House at the House of Insects
Come meet real insects, whether local or from afar, through a playful, immersive visit that challenges common assumptions.
All sizes, shapes and colors are on display. In the heart of an original staging, we invite you to see insects in a new light. Discoveries and thrills guaranteed!
Photos featuring the small creatures from our region will be on display to dazzle you!
Participation requirements: Free | No reservation required
Hours: Saturday, September 19, 2026 — 2:00 PM–6:00 PM
At the Octave Mirbeau multimedia library
Aucun événement annoncé à ce jour, le programme est mis à jour en fonction des annonces officielles.
People of Grass Park
A guided walk with a CAUE landscape architect
The Parc du Peuple de l'Herbe invites visitors to discover this remarkable natural site, its history, and its biodiversity in a new light.
• Guided walk with a landscape designer from the Conseil d'Architecture, d'Urbanisme et de l'Environnement (CAUE).
Saturday, September 19, from 3:00 to 5:00 p.m.
Free — open to all ages 8 and up
Booking required: ppdh@yvelines.fr
+ info at: https://www.parc-peuple-herbe.fr/ses-evenements/sorties-nature
Participation requirements: Free | Booking required - ppdh@yvelines.fr
Schedule: Saturday, September 19, 2026 – 3:00 PM to 5:00 PM
"The Metamorphosis of a Park", a guided stroll with the Park team
The PPDH offers several chances to discover this remarkable natural site, its history, and its biodiversity from a fresh perspective.
• "The Metamorphosis of a Park", a guided walk with the park team.
Saturday, September 19, from 3:30 PM to 5:30 PM
Free – Suitable for all ages from 8 upward
Reservation required: ppdh@yvelines.fr
More info at: https://www.parc-peuple-herbe.fr/ses-evenements/sorties-nature
Participation requirements: Free | Booking required - ppdh@yvelines.fr
Schedule: Saturday, September 19, 2026 — 3:30 PM to 5:30 PM
Dates and Opening Time
From September 20, 2025 to September 21, 2025
Location
Carrières-sous-Poissy
carrières-sous-poissy
78955 Carrieres Sous Poissy
Route planner
Official website
www.carrieres-sous-poissy.fr
