High Quality Content by WIKIPEDIA articles The Vistula Lagoon (Polish: Zalew Wiślany; Russian: Kaliningradskij zaliv or Kaliningradskiy Zaliv; German: Frisches Haff; Lithuanian: Aistmares) is a fresh water lagoon on the Baltic Sea separated from Gdańsk Bay by the Vistula Spit. It is sometimes known as the Vistula Bay or Vistula Gulf. The modern German name, Frisches Haff, is derived from an earlier form, Friesisches Haff. Both this term...