Swietokrzyski National Park was established in 1950 over the area of 6,054 ha. Currently its area amounts to 7,626 ha, out of which 7,212 ha are covered by forests. There are 5 strict nature reserves in the Park.

A very rare plant called Burning Bush (Dictamus albus) can be found on the calcareous and plaster soil in the valley of the Nida river.