Sea of Eternal Dust
The Sea of Eternal Dust is located at the southern rim of the Known World, forming a seemingly impassable border. The silt that composes this 'sea' varies in depth from a few cords to several leagues (the actual maximum depth is uncertain, but in order to allow for the existence of such enormous silt horrors as have been sighted a depth of at least one league would be necessary).
Supposedly, several (or many) islands exist in the Sea of Eternal Dust, but no such tales have ever been authenticated.
Red Storm Village lies near the shore of the Sea of Dust.