The national park covers part of the Stara Planina mountain range. There are picturesque gorges and caves on its territory, including Temnata dupka, which is an archaeological site. It has the form of a labyrinth of underground corridors and galleries. The bones of, among others, cave bears, aurochs and mammoths, as well as stone tools from the Paleolithic period.
There are hiking trails in the park. While hiking, you can come across roe deer, wildcats, hedgehogs and badgers. In total, 36 species of mammals live here, of which more than 20 are bats. There are also nearly 180 bird species, including over 150 under legal protection.
A large part of the park is part of the European protected network, Natura 2000. There are a dozen or so plant species listed in the Red List of Threatened Species. You can also find endemic species here.