River Nile Danube River River Rhine River Volga
Huang Ho River Irtysh River Volga River River Yangtze
River Loire River Volga River Rhine Danube River
River Nile River Yangtze River Amazon River Missouri/Mississippi
Yenisei River River Volga River Ob River Lena
River Nile River Volga River Amazon River Missouri/Mississippi
Russia USA Germany China
River Volga River Yenisei River Lena River Ob
Parana River Grande River River Amazon Madeira River