Do you loveurbex, and the mysterious places that urban explorers bring to light? As part of the Journées du Patrimoine (Heritage Days), we're offering you the chance to live this experience to the full, by discovering disused spots, ruins and buildings usually off-limits to the public, whose secrets arouse our curiosity. You'll be able to explore the underbelly of the region without risk, and even set out to conquer those places that are the source of unanswered questions, and which you may regularly pass by without ever being able to enter.
The Journées du Patrimoine (Heritage Days) are an opportunity for enthusiasts and the curious alike to take advantage of a wide range of cultural opportunities. Paris and the surrounding region will not miss this opportunity to showcase its finest treasures through a vast program of free visits, unique experiences andexceptional openings.
For a weekend, the general public is invited to explore museums, monuments, castles, embassies, ministries, libraries, fashion houses, and much more to discover, through the programs, their histories and behind-the-scenes. Guided tours, special animations, workshops for young and old, imagination abounds to bring a weekend brimming with discovery to life. The next, 43rd edition awaits you this weekend of September 19-20, 2026.
Heritage Days 2026: explore the Ors Estate Nature Reserve and its ruins.
In Châteaufort, in the Yvelines, Domaine d’Ors blends historic heritage with preserved nature along the Mérantaise. The 2026 Heritage Days offer a chance to discover the estate’s history and the remains of a property shaped by centuries of transformation. [Read more]
Heritage Days 2026: The Nymphée Nymphée, a shell grotto in Viry-Châtillon (91)
Heritage Days are back for the weekend of September 19–20, 2026 in Paris and the Île-de-France region. It’s a chance to explore the Nymphée Nymphée, a mysterious shell-covered grotto waiting for you in Viry-Châtillon, Essonne. An offbeat discovery awaits! [Read more]
Heritage Days 2026: a visit to the Bois-Colombes air-raid shelter (92)
History and World War II enthusiasts will be able to enjoy Heritage Days on September 19 and 20, 2026, by visiting the Bois-Colombes air-raid shelter, open to visitors for this occasion. [Read more]
Heritage Days 2026 at the Royal Château of Montceaux: a glimpse into the Château of the Three Queens
How about we head off to discover the ruins of the Royal Château of Montceaux? This historic site in Seine-et-Marne opens its doors for the Heritage Days weekend on September 19–20, 2026. [Read more]
This air-raid shelter in the Paris region will be open to visitors for the 2026 Heritage Days.
Heritage Days are back in the Île-de-France region, and for the occasion an air-raid shelter dating from World War II will be open to visitors in an exceptional visit over the weekend of 19–20 September 2026. [Read more]
Period costumes and a bread oven: Heritage Days program at Fort de Cormeilles-en-Parisis
Visit Fort de Cormeilles during the Heritage Days on Sunday, September 20, 2026. This former military fort, now owned by the Île-de-France Regional Green Spaces Agency, opens its doors to families and history buffs, free of charge, of course! [Read more]
Journées du Patrimoine 2026 : a deep dive into Paris's enigmatic sewer museum
The Paris Sewer Museum is taking part in the new edition of Heritage Days. See you Saturday, September 19 and Sunday, September 20, 2026, for unusual tours beneath the capital’s streets. [Read more]
Journées du Patrimoine 2026 à Paris: Le Regard de la Lanterne, a little-known venue in the 19th arrondissement
Looking to get off the beaten path during the Journées du Patrimoine? How about discovering the Lanterne—an intimate, secret spot in Paris’s 19th arrondissement? Here’s what’s waiting for you on Saturday, September 19, 2026. [Read more]
Heritage Days 2026 at the Maison du Fontainier, a deep dive into Paris's water history
Are you ready to dive into Paris’s history during Heritage Days 2026? What better way to do it than a tour of the Maison du Fontainier, a cornerstone in the capital’s water history. Join us this weekend, September 19–20, 2026. [Read more]
Heritage Days 2026 at the Catacombs of Paris: what’s on!
Heritage Days are waiting for you—even in the depths of Paris's catacombs. Find out what’s planned in the capital’s underground over the weekend of September 19–20, 2026. [Read more]
Heritage Days 2026: Explore the King’s Cellars with a subterranean tour in Sèvres
At Sèvres, history is hidden even beneath the city's streets... During Heritage Days on September 19 and 20, 2026, explore the king’sCellars. Registration will open soon. [Read more]
Dates and Opening Time
From September 19, 2026 to September 20, 2026
