Did you know? The Journées du Patrimoine is the back-to-school cultural event that awaits you throughout Europe on the weekend of September 20 and 21, 2025. For the occasion, Paris and the whole of the Île-de-France region will be revealing their treasures during this event, which features free visits, unusual events and unusual places opening their doors for the occasion. So, are you looking for a good deal?
Take a trip to the Hauts-de-Seine to discover this strange building, which has been standing in the middle ofIle Séguin in Boulogne-Billancourt since 2017. Conceived as a "musical destination",La Seine Musicale boasts an imposing 6,000-seat concert hall, "La Grande Seine", a 1,150-seat auditorium and various rehearsal and recording spaces.
Designed by architects Jean de Gastines and Shigeru Ban, the Seine Musicale is an architectural challenge, as theauditorium sits on the Seine and "its wooden shell seems to float on the Parisian river". During the Journées du Patrimoine 2025 (Heritage Days 2025), discover all the secrets of this venue, which has quickly become an essential part of the region's cultural life.
Listening walk at the Gauthier Mougin Departmental Park (in partnership with the Seine Musicale Open Doors)
Join a guide and two musicians for a thoughtful, sensory walk through the park.
Conceptualized by landscape architect Michel Desvigne, the park stems from an ambitious renaturation scheme for Île Seguin, following more than a century of industrial activity. Its winding route reveals fresh perspectives on the island, the river, and the surrounding territory.
The park also hosts a curated set of contemporary sculptures, forming a veritable open-air museum. This showcase is made possible thanks to support from the Hauts-de-Seine Department, the City of Boulogne-Billancourt, the Emerige Endowment Fund, the National Center for Decorative Arts (CNAP), and the Île-de-France Regional Fund for Contemporary Art (FRAC).
As you stroll, discover the landscape project and a selection of these works, accompanied by improvised music and sound pieces inspired by the landscape and the atmosphere of the site.
Meet at the park entrance, opposite the Tot'Aime sculpture by Jean-Charles de Castelbajac.
https://ileseguin-rivesdeseine.fr/fr
Participation conditions: Free. Note: meet beside the artwork "Toi t'aime" by Castelbajac, opposite the Seine Musicale - Free | No reservation required
Schedule: Saturday, September 19, 2026 – 11:00 to 12:30
Dates and Opening Time
On September 19, 2026
Location
La Seine Musicale
Île Seguin
92100 Boulogne Billancourt
Route planner
Accessibility info
Access
Metro line 9 Pont de Sèvres station (terminus). Exit 1 (take Quai Georges Gorse then Pont Renault) T2: Brimborion or Musée de Sèvres stations, then take the footbridge Bus: 160 - 169 - 171 - 179 - 279 - 291 - 389 - 429 - 467 Pont de Sèvres station
Prices
Free
More information
Free access, no reservation required
