Kwisa
River in Poland
The Kwisa is a river in south-western Poland, a left tributary of the Bóbr, which itself is a left tributary of the Oder river.
It rises in the Jizera Mountains, part of the Western Sudetes range, where it runs along the border with the Czech... Wikipedia
Source: Jizera Mountains
Basin size: 1,026 km2 (396 sq mi)