In Seine-et-Marne, an after-dark encounter with vanished monsters for the 2026 Night of Museums.

There’s one subject that captures the imagination of children of all ages—and even their parents: prehistory and archaeology. Who wouldn’t be fascinated by the beings, creatures, and stories from the time before us? If you want to learn more about these intriguing topics, head over to the Espace Gaïa Museum in Montereau-Fault-Yonne, located in Seine-et-Marne. This little-known museum delves into the earliest moments of Earth's history, with exhibits focused on dinosaurs, sharks, and cave art...

And why not seize the Night of Museums to discover this museum? This Saturday, May 23, 2026, the Musée Espace Gaïa opens its doors to the public for free in the evening, offering a compelling dive into history. All curious minds, young and old, are invited for a special after-hours visit.

Let's talk about the Nuit des Musées—it's the perfect occasion to stock up on cultural outings in an unusual setting. Each spring, this flagship event on the Île-de-France calendar invites us to enjoy numerous free late-night openings, often accompanied by special activities. Curious to discover the program awaiting us at the Musée Espace Gaïa for this 22e édition? We reveal it below!

• To be read
• This week's top deals in Paris and Île-de-France, April 20–26, 2026.
• Museum Night 2026: the full program for the next edition in Paris and Île-de-France

What’s on for Nuit des Musées 2026 at the Espace Gaïa Museum in Seine-et-Marne:

• Exhibition "The Monsters of Lost Worlds"
  Saturday, May 23, 2026 — 9:00 p.m. ⤏ 11:59 p.m.
  

  Monsters of the Lost Worlds

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  A permanent exhibition, “Monsters of the Lost Worlds,” inviting every visitor to trace the evolution of life over 450 million years.

  Numerous casts and fossils bolster the narrative visually.

  Other elements, such as the fluorescence of minerals, promise to yield striking discoveries.

  
  
  

An exciting evening awaits young visitors and their families! For more family-friendly outings, check out our dedicated guide. Wishing everyone a memorable Night of Museums!

Night of Museums 2026 for Families: Exciting Events to Experience with Kids in Paris and Île-de-France
Interested in family-friendly Museum Night 2026? This Saturday, May 23rd, we're taking the kids to special exhibitions and workshops starting in the afternoon. Check out the kid-friendly lineup for this exciting new edition! [Read more]