Slowiński National Park is a National Park in Pomeranian Voivodeship, northern Poland. It is situated on the Baltic coast, between Leba and Rowy. The northern boundary of the Park consists of 32.5 kilometres (20.2 mi) of coastline.
In the past, the park’s area was a Baltic Sea bay. The sea’s activity, however, created sand dunes which in the course of time separated the bay from the Baltic Sea. As waves and wind carry sand inland the dunes slowly move, at a speed of 3 to 10 meters per year. Some dunes are quite high - up to 30 meters. The highest peak of the Park – Rowokol (115 metres (377 ft) above sea level) – is also an excellent observation point. The "moving dunes" are regarded as a curiosity of nature on a European scale.