Radullu is an unnatural lake fed by waters from another world. Sited on a high plateau, it is fed by an underwater rift, the Radullu Rift, linked to an ocean on the world of Throndar. After the rift's opening, a lake grew around it, and over thousands of years it greatly expanded the wetlands of what today is known as the Troll Bogs.
Lake Radullu sits at an elevation of 6000'. Always filled and overflowing, water exits the plateau over hundreds of waterfalls, plunging some 2000' into an even larger lake called Orukhan. Other waterfalls on the western side of the plateau, dump into the bay of Tarag-Khâlu. Falling from a height of 5000' or more, most of this water turns to vapor or is blown around so that for miles away into the bay it seems like it is always drizzling.