Lake Korsinoria is the largest and most southerly of a sequence of three lakes in southern Varno, a county of Ustalav known to have particularly rough waters. The lake lies to the north of the settlement of Corvischior and Castle Corvischior, which is sometime designated Korsinoria Palace. There are caverns underneath the lake known to and used by the current lord of Castle Corvischior, Count Ristomaur Tiriac. All three lakes in the sequence lie to the east of the Forest of Veils. Its two companion lakes, Drakeye and Lake Eirio, are located to its north. No significant rivers flow out of any of these lakes.