Discover the banks of the Marne, from Champigny-sur-Marne to Rosny-sous-Bois, during a free cultural and family hike, on June 4, 2023. An opportunity to admire an exceptional heritage along the way!
This is one of the projects being carried out as part of the 2024 Olympics: the depollution of rainwater in Champigny-sur-Marne, to enable swimming to return to the Marne after the Games.