However , there are no bridges across the Danube River in this region , and ferries are the only way to cross the river .
The well - developed road network between Melk and Krems follows the contour of the valley .
There are no bridges across the Danube River in this region , and ferries are the only way to cross the river .
The well - developed road network between Melk and Krems follows the contour of the valley .