Midbay and the Nyr Dyv

  The blue expanse of the Nyr Dyv is the largest known fresh water lake upon Oerik.  Midbay, where the waters of that lake gather to form the Selintan River, is one of its most placid regions.
  The Nyr Dyv has three major inlets (the Artonsamay, Veng, and Vlverdyva Rivers) and an outlet greater than the Selintan in the Nesser River.  All these are even more navigable than the Selintan and, thus, the lake has become a major center of commerce in the known world.
  Monsters of a variety of horrid types are known to dwell in the Nyr Dyv's darkest reaches (its name means "Lake of Unknown Depths").  Fortunately, the shallow waters of the Midbay seem to prevent these creatures from intruding there - except during times of epic flooding. Legends tell of monsters invading the Midbay and even the Selintan River in days long past during times of great floods.
  Naval fleets from several bordering nations patrol the waters of the lake, protecting commerce against piracy or, more often, seeking and slaying the troublesome sea serpents wherever they can be found.

Greyhawk Territorys