What to do yvelines

The Star Park in Triel-sur-Seine (78): a hub for discovering astronomy and space

Located in Triel-sur-Seine, in the Yvelines department, Parc aux Étoiles is a scientific facility devoted to astronomy, space exploration, and the sciences of the Universe. Open to the public year-round according to a program of visits and activities, it offers exhibitions, a planetarium, and public observing evenings accessible to all.

Science Festival 2026 in Saint-Cyr-l’École (Yvelines): what’s on the program

The Science Festival 2026 returns to Saint-Cyr-l'École, in Yvelines, offering free activities around the theme "Savvy Flavors" from October 2 to 12, 2026. An edition dedicated to nutrition, taste, health and the environment.

Yvelines Ciné 2026: Outdoor cinema returns across the entire department this summer

From July 13–26, and then from August 13–29, 2026, Yvelines Ciné hits the road for its 15th edition. Organized by the Yvelines Department, this itinerant festival offers free outdoor screenings of films in dozens of municipalities.

Flea markets and garage sales in Yvelines this weekend, August 8–9, 2026 - 78

Which flea markets and rummage sales are waiting for you in August in Yvelines? If, for the moment, events planned for this first weekend are few and far between, here’s what you can expect on August 8 and 9, 2026.

Flea markets and brocantes from Saturday, August 1 to Sunday, August 2, 2026 in Paris and the Île-de-France region — this weekend’s program.

This weekend, flea markets and rummage sales are popping up across Île-de-France. Here are the events to check out this Saturday, August 1, and Sunday, August 2, 2026, for thrifting, digging around, and maybe unearthing a rare gem.

Val de Seine leisure island: swimming is open daily in Yvelines

The Val de Seine leisure island reopens its supervised lake in Verneuil-sur-Seine, in the Yvelines. Swimming is now allowed daily until August 30, 2026, alongside the beach, pedal boats, mini-golf, and the nautical center.

Fan zones Spain-Argentina in the Yvelines: where to watch the final this Sunday?

Certain fan zones in Yvelines switch on their giant screens, but not all, for Spain-Argentina, the 2026 World Cup final to be played this Sunday, July 19, 2026: here's a rundown of the free spots confirmed in the 78.

Spain–Argentina in Yvelines: the guinguette-style fan zone in Mesnil-Saint-Denis (78) this Sunday

La Guinguette des Ateliers du Mesnil-Saint-Denis (78) relaunches its giant screen for Spain–Argentina, the 2026 World Cup final, this Sunday, July 19. Free-to-access fan zone.

5 hikes in the Rambouillet Forest and the Chevreuse Valley, accessible by public transport

To the west of Paris, the Rambouillet forest hides treasures and, even better, hiking trails just waiting to be explored. We take you into this Île-de-France forest, accessible by public transport, for a few scenic outings.

National Day 2026 in Achères (78): fireworks postponed, the guinguette and the fire show are still on.

The town of Achères in Yvelines (78) has decided to mark Bastille Day 2026 with a lively fanfare, a guinguette-style gathering, and a fire show on July 13, despite the fireworks being canceled.

France-Spain: the semifinal in the biggest fan zone in the Yvelines.

The Yvelines’ biggest fan zone relights its giant screen for France vs. Spain, the 2026 World Cup semifinal, this Tuesday, July 14, 2026, in Carrières-sous-Poissy. Entertainment, food trucks, and a beverage stand will welcome 2,000 supporters, free of charge.

France–Spain: Maisons-Laffitte fan zone for the semi-final

The Maisons-Laffitte fan zone switches on its big screen for France vs. Spain, the 2026 World Cup semifinal to be played on Tuesday, July 14. In Yvelines, access to Place du Maréchal-Juin remains conditional on wearing a wristband.

France vs. Spain on a giant screen: Perray’s free fan zone (78) this July 14

France-Spain will be broadcast on a giant screen at the Parc municipal du Perray-en-Yvelines this Tuesday, July 14, 2026. The town is setting up a free outdoor fan zone so fans can watch the 2026 World Cup semi-final together.

Heatwave in Yvelines: Fireworks, sporting events and major gatherings banned

Les Yvelines return to red heatwave vigilance from Saturday, July 11, 2026, triggering bans on fireworks, sporting events and major gatherings until July 15 across the department in the face of extreme heat.

This Louis XIII-era château in the Yvelines is set to rise again after two years of work.

The restoration of Château de Plaisir, a Louis XIII jewel in Yvelines, enters the final stretch after two years of work. The historic monument and its 17th-century dovecote are gearing up to begin a new chapter of cultural life.

Hollande Ponds: the free riverside guinguette beach with no swimming in Yvelines has reopened.

The Étangs de Hollande beach reopens this Saturday, July 4, 2026, in Yvelines (78), after several days of closure caused by storms. We set out to explore the site, from hot sand to deck chairs, inflatable castles, a guinguette, and a free sunset concert that await you through August 30, 2026.

This all-you-can-eat brunch is a real Green Break in the Yvelines, with its large terrace.

The all-you-can-eat brunch at La Parenthèse Verte, tucked away in a verdant park in Louveciennes, Yvelines, is evolving with an expanded terrace, redesigned décor, and an enlarged menu. We headed back to rediscover this transportive spot just a few kilometers from Paris.

Free castles, museums and monuments in Yvelines, Sunday, July 5, 2026, the first Sunday of the month

The first Sunday of the month, many monuments, castles, museums, and historic sites in Yvelines open their doors to visitors for free. But that isn’t the case for everyone, all year round. To help you navigate, here is the list of cultural sites in the 78 to visit this Sunday, July 5, 2026.

Cern'estival: the free Solidays-style festival from the 78 lands in Yvelines

Le Cern'estival brings its stages to Parc Pelouse de Cernay-la-Ville in Yvelines for its inaugural festival, pairing live concerts with a gourmet market and an eco-friendly ethos. See you on Saturday, July 4, 2026, with free entry.

The medieval fortress of Beynes, the jewel of the Yvelines, has been linked to Diane de Poitiers.

A medieval fortress of the Yvelines, Beynes Castle hides a centuries‑old history and an unexpected link to Diane de Poitiers. Just 30 km from Paris, in the heart of this Yvelines town, its ruins—listed as a Historic Monument—are open to visits year‑round in Beynes. We set out to explore the site on a short break and now reveal a portion of its secrets.