The Journées du Patrimoine (Heritage Days) are making a comeback on the weekend of September 20 and 21, 2025. For the occasion, a number of visits and events await you in Lagny-sur-Marne, Île-de-France.
Meet on May 26, 2019 in the morning by the Marne riverbanks in Lagny-sur-Marne to take part in a citizen and eco-friendly race: the Clean Run. The goal? Collecting as much trash as possible in 2 hours!
