Wilderness Landscape & Natural Heritage
The Marais Audomarois is a vast wetland located near the town of Saint-Omer in the Hauts-de-France region. It covers a flat, low-lying area characterized by intersecting canals, ponds, and patches of cultivated gardens. The marsh stretches over approximately 8,000 hectares and represents a rare blend of natural and cultural heritage where traditional market gardening thrives alongside diverse ecosystems. Its geography owes to sedimentary layers deposited by the Aa River and the historical human management of water through dikes, sluices, and drainage networks. Ecologically, the area hosts a rich variety of aquatic plants, migratory birds, amphibians, and fish species, providing important breeding and feeding grounds. Historically, the marsh has been cultivated since the Middle Ages, and the small farms and fishing activities continue to shape its character. Outdoor visitors can enjoy activities such as canoeing along peaceful waterways, birdwatching in protected zones, walking or cycling on networked paths adjacent to the canals, and exploring charming villages within the marsh. The floating gardens of the 'Huitrières' and ancient windmills are notable landmarks, reflecting the area's agricultural and engineering heritage. Marais Audomarois appeals to nature lovers, photographers, and families seeking tranquil recreation in a landscape shaped by water and human ingenuity.












