The greatest tourist attraction of the Slowinski National Park are mobile dunes on the Leba Bar. They reach a maximum height of 56 m (184 ft) a.s.l. (Czolpinska Dune) and exibit a diversity of aeolian forms created by the accumulative, erosional and deflational activity of the wind.
Slowinski National Park is situated just west of Leba. The predominant features of the Park's landscape are coastal lakes, beaches and dunes of different relative heights.
The mobile dunes move along the Bar from west to east at rate 2-24 m (7-79 ft)/year, the highest of them /Lacka Dune/ is 35 m (115 ft) a.s.l.
These forms are highly variable in time and space and can change from one month to the next, depending on the strenght and direction of the wind and the degree of stabilisation by vegetation.
Walking on the dunes in Leba is forbidden (except special paths) but you can see them directly from the beach, of course there are much smaller then the dunes in Slowinski National Park.