An excellent area in terms of biodiversity. The national park includes a 30-50 m high-rise of the ancient shore of the Baltic ice lake, which has a species-rich natural wide-leaf forest; as well as a complex of cangares and vighs - several km of dunes (cangars) intersected with narrow, overswamped gullies (wigs), mainly the low bogs. . At the foot of the blue hills is an abrazy plain with natural wetmoist forests and a swamp of concern, the high swamp of the sea, which converges with cangara and viga complexes. U. An integral part of the national park is the seaside with sandy beach and dunes, dry meadows, dry pine forests of dunes, as well as coastal aquatorium. National park is on the rise of bird migration a. In spring, there is a grandiose concentration of migratory birds. One of the richest habitats of Annex 1 to the EU Habitats Directive in Latvia.