Watch FMovies. The "Curonian Spit" is a 98 kilometre long sand dune peninsula that separates the Curonian Lagoon from the Baltic Sea. The width of the spit between the lagoon′s beach and the beach of the Baltic Sea often amounts to no more than several hundred metres. In this film, documentary filmmaker Volker Koepp portrays this unique region that in its history was again and again subjected to shifting borders and the resulting social upheavals due to its geographical location between Germany and Russia.