As I am spending December in Denmark, my entry will be from that country. The North of Denmark is called Vendsyssel. It's located between Skagerrak and Kattegat , ie. between the North and Baltic Seas. Prevailing west winds have created a phenomenon of nature - sand dunes far from the nearest sea shore. The dunes are... wandering, from west to east. Wind moves particles of sand, and one by one, moves a few square km of dunes inland. They move some 18m / year - so one can observe the effect during a lifetime. Here's full story