Gaißa
The Gaißa is a river in Bavaria, southeastern Germany, which is a tributary of the Danube. It flows through the Bavarian Forest from North to South, crossing Aicha [vorm Wald] and joining the Danube northwest of Passau. The river reaches a length of ; including its source river Große Ohe which is long. Due to the nearby motorway, a good deal of dirt was flushed into the water from time to time.