As part of World Wetlands Day, the Conservatoire d'espaces naturels des Hauts-de-France, in collaboration with the commune of Sacy-Le-Grand and the Conseil Départemental de l'Oise, is offering a free nature walk from 10am to 12.30pm on 25 February. You will discover a vast wetland and peat area, essentially alkaline, of great ecological and heritage interest. Places are limited to 20 people. The meeting point will be communicated on booking. Please note: bring boots (or suitable footwear) and, if you have them, a pair of binoculars.