The park encompasses the central and lower part of the Nida River Valley, Solecka Basin, and the north-western part of the Pińczów Hummock of the total area of 57,000 acres.
It protects a wealth of inanimate and animated nature in nine nature reserves: Skowronno, Grabowiec, Pieczyska, Krzyżanowice, Skorocice, Skotniki Górne, Winiary Zagojskie, Przęślin and Góry Wschodnie. Noteworthy is the gypsum series featuring a unique complex of gypsum karst phenomena and formations.
The Nida River Valley is a characteristic element of the park landscape with its numerous meanders and old riverbeds creating an important ecological corridor as well as a habitat of mud and aquatic birds. Well-sunlit slopes of gypsum and lime hills are occupied by one of Poland"s largest community of xerothermic plants. Following are the names of certain rare species: burning bush, Cardina onopordifolia, Dorycnium germanicum, Serratula lycopifolia, Arabis recta, Sesleria uliginosa, everlasting pea, Reseda phyteuma, Veronica paniculata, Veronica praecox, Sisymbrium polimorphum, Linum hirsutum, Stipa capillata and Stipa joannis.