The Mer de Sable nature reserve is a 22-hectare protected area, renowned for its peat moors and young birch forests. Formerly a pond that dried up in the 19th century, …
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 …