Rāzna National Park was established to preserve natural values, as well as the characteristic cultural and landscape environment of Latgale in a large area of Latgale. Here, 14 habitats of Annex 1 of the EU Habitats Directive have been identified. 14% of the territory is occupied by eutrophic lakes. Relatively large diversity of meadows (4 types of meadow habitats of European importance). One of the most scenic lakes - Ežezers - with 26 islands, which are covered mainly with deciduous forests. There are also spruce forests and springs. An important area for the protection of oak forests, boreal forests and mineral-rich springs on the islands. Green dicotyledonous and yellow cuckoo (EU Directive species) have been found on several islands. Island forests are suitable for woodpecker nesting.