Pol Vishar River
From Ardrana
The Pol Vishar River is the longest waterway in eastern Rannas i'Drasoin. It flows southwestward out of the foothills of the Kieryan Mountains through the western Forest of Thir until it reaches the Wall of Night at the city of Ugarra. There, it drops the height of the wall, forming Twerrik Falls and Lake Twerrik at the bottom.