Böse Sieben

Böse Sieben (German for "evil seven") is a river of Saxony-Anhalt, Germany, flowing through the town Eisleben.

The Böse Sieben originates from the eastern regions of the Harz, the sources of the river are the Vietzbach (or Goldbach) and the Dippelsbach, which confluence in Ahlsdorf. Beside from that it has 8 tributaries, the Kliebigbach, Goldgrundbach, Pfaffengrundbach, Saugrundbach, Wolferöder Graben, Hünsche Born, Wilder Graben and the Kalte Graben. Because the river has caused many floods after heavy rainfalls it was named "Willerbach" (mansfeldian dialect for "wild river") in the past. Later in the 19th century it was named "Böse Sieben". It flows through the Süßen See and the Bindersee to the Kernersee, which has no natural outflow.