The park boundaries encircle the highest part of the Western Bieszczady Mountains, in the corner of Poland bordering on Slovakia and the Ukraine.

The main peak, Mount Tarnica, has the altitude of 1,346 meters above sea level.

Woodless, grassy ridges called połoniny, are a distinctive feature of the mountains in the park. Local vegetation includes a great number of rare, East Carpathian plants. Forests, mostly beech with some fir and sycamore stands, cover 87 percent of the park.

Bear, wolf, red deer, bison, lynx to mention only a few mammals, and about 150 species of birds have found a haven here.

The park, together with adjoining lands, has been incorporated into the “Eastern Carpathians” international biosphere reserve, which straddles the region of the convergent borders of Poland, Slovakia, and Ukraine.