Not far from Haut-Koenigsbourg castle, the town of Sélestat has preserved a wetland of 1,855 hectares recognised on European level, the Sélestat Ried regional nature reserve or Ill*Wald, which takes its name from the Ill forest (“Illwald” in Alsatian). The reserve is home to a diverse fauna and a rich flora. Its wet meadows are home to more than 160 remarkable plants such as the gratiola (Gratiola officinalis), the marsh fern (Thelypteris palustris), the marsh euphorbia (Euphorbia palustris), the incarnate orchis (Dactylorhiza incarnata subsp. Incarnata), the bear’s garlic (Allium ursinum) and the meadow sweetgrass (Scorzonera humilis).