Warnow basin

thumb|left|River Warnow in a valley The Warnow () is a river in the state of Mecklenburg-Vorpommern in Germany. It flows into the Baltic Sea near the town of Rostock, in its borough Warnemünde.

lake in Bützow, Mecklenburg-Vorpommern, Germany

thumb|Unterwarnow on the map of 1788 Unterwarnow is the estuary of the Warnow River in Mecklenburg-Vorpommern, northern Germany. It connects with the Baltic Sea in Warnemünde. The city of Rostock is located on its banks.