100 Incredible Views Out Of Airplane Windows. Curonian Spit (shared between Lithuania & Russia) is a 60-mi long, thin, curved sand-dune spit that separates the Curonian Lagoon from the Baltic Sea coast. A UNESCO World Heritage Site
Amber from Poland,
The Baltic Sea and North Sea are waters of different densities so where they meet, they don't mix. I think this is the coolest thing ever.
Skagen, Denmark where the Baltic Sea and the North Sea meet. Due to the very different water densities and chemical differences those two don’t fancy mingling or mixing. As a result they create the most amazing phenomenon of two bodies of water side by side.