Like most of the wetlands in the Haine valley, the Harchies-Hensies-Pommeroeul marshes were formed in subsidence caused by mining. The depressions were formed in the mid-1920s and immediately filled with …
Lake Bernissart is an artificial pond with an area of 10 hectares, surrounded by wooded areas and wasteland. Created as part of local mining activities, the site is today recognized …