The Hangar Y, which conceals a 10-hectare natural area planted with trees, offers a year-round open-air art walk, free on weekdays and €3 with access to the Hangar on weekends. Since April 28, 2025, new works have been added to the circuit. From Erwin Wurm and Lionel Sabatte to Pauline Tralongo and Odile Decq, it's time for an unusual, unplugged stroll through the heart of the Hauts-de-Seine.