Guided tours by boat builders: Shipyards and swamps by boat Saturday and Sunday at 10:30, 1:30, 2:45 and 4 pm Discover the workshop and shipyard of the last Craft Builders of the Audomarois swamp before embarking in a bacôve! It is in this traditional boat that your guide will make you discover the rivers of his childhood, the treasures of nature and the history of this swamp shaped by human activities for thirteen centuries. This superb guided walk will take you through the marsh of Saint-Omer between the faubourg of Lyzel and its traditional houses, a vegetable polder and the river of the Grande Meer. Along the way, a wide panorama of the city of Saint-Omer and its bell towers will be offered to you. The guide, passionate about the places, knows the swamp and its history like his pocket! 43 Route de Clairmarais, Saint-Omer. Duration: 1h30. Price: 11,5€/adult, 9,5€/young or student, 7,5€/ child from 4 to 13 years and free for toddlers. On-line booking on the websourcesdebateaux.fr