A cretaceous chalk plate area of Bohemia with unique geomorphological relief made of block sandstone. The main relief features are determined by the relationship  between the two main groups of surface forms: plateaus and often deep, terraced valleys, on the edges of which rock-column formations have arisen Rock towers, numerous medium-sized forms and micro-forms have arisen by selective weathering in forms and to an extent not seen elsewhere  in the Czech Republic. The most famous are the "rock lids" on aeroxyst sandstone. The dominant landscape features are magmatic extruded rocks consisting of  phonolite, basalt or trachyte mounds and cones (Vlhošť 614 m, Ronov 552 m, Vrátenská Hora 507 m). The previously mentioned characteristic features of the area, together with the effect of the climate of the neighbouring temperate area of Polabí create  a variety of conditions. As a result, a whole range of plant species, from thermophilous (on the remains of rock steppes) to cryophilous (in climatic inversion areas), occur here. Wet meadows, wetland coenosis and pools are typical of the Liběchovka and Pšovka stream valleys. The wetlands area was added to the Ramsar List of Wetlands of International Importance in 1997. The wetland biotopes are rich in plant as well animal species that are red-listed for the Czech Republic.

Most of the forest area consists of indigenous woody species. Thanks to the large forested area and the sparse structure of housing estates, this countryside is unusually conserved, and  its unique beauty is also underlined  by numerous examples  of original log, half-timbered or brick-wall architecture. The famous Kokořín castle adds even more to the scenic and romantic nature of the landscape.