Kaliningrad region, Zelenogradsk. A city at the very base of the famous Curonian Spit, very close to Lithuania and not far from Poland, which was recently a German resort town with the beautiful name Kranz.
Curonian Spit. A narrow strip of land 98 km long and 400 m wide at its narrowest point to 4 km wide at its widest. This is the largest sandy mound in the world, and the second highest dunes in the world (higher only in the Gulf of Gascony in France), their age is more than 6 thousand years.