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.
Odžaci
Hydrological features of this region were created both by the activity of the Danube River and human work throughout the past and present. The part of the river that runs through Odzaci municipality is 10 km long and is its most valuable natural resource. Between the mighty Danube and a lowland forest, in the place where the river is bridged on its way towards Erdut in the neighboring Croatia, there are dozens of vacation homes. There is a small harbor with a number of river boats that can be used for sightseeing this beautiful area.