Vistula Spit

The Vistula Spit (Polish: Mierzeja Wiślana; Russian: Балтийская коса; German: Frische Nehrung) 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 (Pomeranian Voivodeship) 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.

Until the 13th century, the spit had navigable straits in the middle, which allowed the city of Elbing, part of the monastic State of the Teutonic Knights, direct access to the Baltic Sea. The natural closing of the straits in the late 13th century reduced Elbing's status as an important trading seaport. This and the Teutonic takeover of Danzig (Gdańsk) and Polish Pomerania in 1308 led to the increased importance of Gdańsk.