Sakte River
From DQWiki
This is a river which came from the inner Gatar Depression and which dried up in 737wk and is now a dried river bed.
It originated some 120miles East NorthEast (ENE) of the city of Saktekorum and flowed West SouthWest (WSW) to the sea.
No-one knows why it no longer flows from its source and a number of expeditions have searched for the reason but may of these never returned or if they did, they had tales of madness and woe.