"Jastkowice" Reserve was created in 1959, it has an area of 45 hectares.
It includes original mixed forest, once typical for Solska Forest. It is characterized by beautiful old trees, monumental 200 years old firs, lindens, oaks, beeches and maple trees. Floristic richness includes approximately 250 species of vascular plants, e.g. Turk's cap lily, mezereon. Numerous hollows of trees are occupied by bats and owls.