Danube
The Danube flows through many cities, including four national capitals (shown below in bold), more than any other river in the world. Ordered from the source to the mouth they are:
The Danube is navigable by ocean ships from the Black Sea to Brăila in Romania and by river ships to Kelheim, Bavaria, Germany; smaller craft can navigate further upstream to Ulm, Württemberg, Germany. About 60 of its tributaries are also navigable.
Donauried
The Donauried is a river landscape around the Danube in western Bavaria between Neu-Ulm and Donauwörth. Water meadow woods dominate the scene from Ulm to Lauingen. In addition, the man-made reservoirs near Faimingen, the Swabian Donaumoos between Ulm and Gundelfingen as well as the Gundelfingen park landscape in this wetland region of the Danube are of international importance under to the Ramsar Convention, the international treaty on wetlands. Birds, amphibians, dragonflies, damselflies, grasshoppers, crickets and butterflies have their habitats in the fens. Several species of plant native to the Donauried are classified as endangered on the IUCN Red List and reserves like the Apfelwörth or Eastern Donauried Bird Reserve have been established to protect the variety of species. A particular success in recent years has been the recolonisation by the white stork (Offingen, Gundelfingen, Lauingen, Höchstädt).