5. Vistula SpitBaltiysk The Vistula Spit is an aeolian sand spit, or peninsular stretch of land, which separates Vistula Lagoon from Gdańsk Bay in the Baltic Sea, with its tip separated from the mainland by the Strait of Baltiysk. The border between Poland and Kaliningrad Oblast, an exclave of Russia, bisects it, politically dividing the spit in half between the two countries. The westernmost point of Russia is located on the Vistula Spit. The Polish part contains a number of tourist resorts, incorporated administratively as the town of Krynica Morska. From Wikipedia, the free encyclopedia.