Farn im SonnenlichtIn terms of land area covered, the forest plays only a minor role in the Lower Oder Valley National Park. Besides what remains of the hardwood and softwood riparian forests on the polders, there are remarkable woodlands on the slopes of the Oder Valley (that is the lateral moraines of the glacial valley as it was formed in the post-glacial period of the last ice-age). Since the slopes on which these forests grow are so steep, they remained inaccessible to logging and were untouched until they became integrated into the Protective Zone I (Wilderness Area) with the founding of the National Park in 1995. The rare attributes unique to these forests will now remain protected.