Danube River, Germany/Austria/Hungary/Romania, Europe, 2,860 kilometers

The Danube River is located in Germany, Austria, Hungary, and Romania in Europe.

It is 2,860 kilometers long.

The Danube River is an important source of transportation, power generation, and irrigation.

It has a long history of providing a waterway for trade and transportation.

The Danube River has a diverse and unique ecosystem that includes a variety of fish and plant species.

The Danube River is popular for recreational activities, such as fishing, swimming, and boating.

There are a number of environmental issues associated with the Danube River, such as water pollution and over-fishing.

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