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Curonian Spit is a 98 km long, very thin avalange 600m, curved sand-dune spit that separates the Curonian Lagoon from the Baltic Sea.
Great Sand Dunes National Park is one of the most amazing places I have ever seen. The initial plan was to camp overnight, but unfortunately it is black bear country. Since I had lots of food in the trunk of my car, I chickened out and decided not to camp. Yet, I did visit the place for just a couple of hours which were more than enough to have an amazing time.