Its heritage, its sights, the personalities who have passed through it… you will know everything (or almost) about this remarkable green heritage in the heart of the city. On this occasion, photo enthusiasts are invited to bring their camera or phone. During the walk, participants will be able to capture the highlights of the visit and participate in a photo contest. 4 themes to choose from: the castle and its pond, the Love Time, the animals of the park, and an unusual photo. Photos must be sent by email to culture@ville-osny.fr for the jury to choose the winning photo. Two seats for the play «Comment survivre à mon ado», scheduled at the Forum des arts on October 7 at 8:30 pm.