Nyr Dyv
THE LAKE OF UNKNOWN DEPTHS
“This body of water is the largest fresh water lake known to us, although legends and tales report of a veritable sea far to the west, if such stories can be believed. Much commerce plies the waters of the lake, for Nyr Dyv has many navigable inlets (Artonsamay, Veng and Velverdyva Rivers) and outlets (the broad Nesser River and the Selintan to a lesser extent). Its central position combines with these river routes to make it the busiest body of water in or around the Flanaess. The cities of Admundfort, Radigast, Leukish, Dyvers and even Greyhawk, rely heavily on this mercentile shipping. Squadrons of warships move continually about its surface to keep raiders to a minimum and combat occasional predatory water creastures as well.
One of the most unusual features of the Lake of Unknown Depths is the people who make their home upon great barges….Calling themselves the Rhennee, the lake folk can be found in all waters–rivers and lakes which connect to the Nyr Dyv–navigable by their barges, but always returning to Nyr Dyv in winter.” Gygax 1983